STAT 200: Introduction to Statistics Final Examination, Spring 2016 OL4 Page 1 of 7
STAT 200
OL4/US2 Sections
Final Exam
Spring 2016
The final exam will be posted at 12:01 am on May 6, and it is due
at 11:59 pm on May 8, 2016. Eastern Time is our reference time.
This is an open-book exam. You may refer to your text and other course materials
as you work on the exam, and you may use a calculator. You must complete the
exam individually. Neither collaboration nor consultation with others is allowed.
It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use
unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible.
Show all of your work and reasoning. In particular, when there are calculations
involved, you must show how you come up with your answers with critical work
and/or necessary tables. Answers that come straight from calculators, programs
or software packages will not be accepted. If you need to use software (for
example, Excel) and /or online or hand-held calculators to aid in your calculation,
you must cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 200 total points; 10 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics Final Examination, Spring 2016 OL4 Page 2 of 7
1. True or False. Justify for full credit.
(a) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.2.
(b) If all the observations in a data set are identical, then the variance for this data set is 0.
(c) The mean is always equal to the median for a normal distribution.
(d) It’s easier to reject the null hypothesis at significance level of 0.01 than at significance
level of 0.05.
(e) In a two-tailed test, the value of the test statistic is 2. If we know the test statistic follows a
Student’s t-distribution with P(T >2) = 0.03, then we have sufficient evidence to reject the
null hypothesis at 0.05 level of significance.
2. Identify which of these types of sampling is used: cluster, convenience, simple random,
systematic, or stratified. Justify for full credit.
(a) The quality control department of a semiconductor manufacturing company tests every 100
th
product from the assembly line.
(b) UMUC STAT Club wanted to estimate the study hours of STAT 200 students. Two STAT 200
sections were randomly selected and all students from these two sections were asked to fill out
the questionnaire.
(c) A STAT 200 student is interested in the number of credit cards owned by college students. She
surveyed all of her classmates to collect sample data.
(d) In a career readiness research, 1.
STAT 200 Final ExaminationFall 2016 OL3Page 4 of 9Answer all 2.docxwhitneyleman54422
STAT 200 Final ExaminationFall 2016 OL3Page 4 of 9
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
(c)
(d)
(e)
Justification:
2
Answer:
(a)
(b)
(c)
Justification:
3
Answer:
(a)
(b)
Justification:
4
Answer:
(a)
IQ Scores
Frequency
Relative Frequency
50 - 69
23
70 - 89
0.250
90 -109
450
110 - 129
130 - 149
23
Total
1000
(b)
(c)
Work for (a) and (b):
5
Answer:
(a)
(b)
(c)
Justification:
6
Answer:
(a)
(b)
Work for (a) and (b):
7
Answer:
(a)
(b)
Work for (b):
8
Answer:
(a)
(b)
Work for (a) and (b):
9
Answer:
(a)
(b)
Work for (a) and (b):
10
Answer:
Work:
11
Answer:
(a)
(b)
Work for (b) :
12
Answer:
(a)
(b)
Work for (a) and (b):
13
Answer:
(a)
(b)
Work for (a) and (b):
14
Answer:
Work:
15
Answer:
Work:
16
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
17
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
18
Answers:
(a)
(b)
(c)
(d).
Work for (b) and (c):
19
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
20
Answer:
(a)
(b)
Work for (a) and (b):
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL3 Page 2 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A AND Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) If a 95% confidence interval for a population mean contains 1, then the 99% confidence
interval for the same parameter must contain 1
(d) When plotted on the same gra.
STAT 200 Introduction to Statistics Final Examination, Su.docxwhitneyleman54422
STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL2 Page 1 of 8
STAT 200
OL2 Sections
Final Exam
Summer 2016
The final exam will be posted at 12:01 am on July 22, and it is due
at 11:59 pm on July 24, 2016. Eastern Time is our reference time.
This is an open-book exam. You may refer to your text and other course materials
as you work on the exam, and you may use a calculator. You must complete the
exam individually. Neither collaboration nor consultation with others is allowed.
It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use
unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible.
Show all of your supporting work and reasoning. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 200 total points; 10 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL2 Page 2 of 8
1. True or False. Justify for full credit.
(a) If P(A) = 0.4, P(B) = 0.5, and A and B are independent, then P(A AND B) = 0.2.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) The mean is always equal to the median for a normal distribution.
(d) A 90% confidence interval is wider than a 95% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a distribution
with the distribution curve shown below. If we know the shaded area is 0.96, then we have
sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) UMUC Stat Club conducted a survey on STAT 200 study hours. The survey result showed
that 54% of the respondents spent more than 20 hours each week on STAT 200. The value
54% is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) UMUC STAT Club wanted to estimate the study hours of STAT 200 students. Two STAT 200
sections were randomly selected and all students from these two sections were asked to fill out
the questionnaire. This type of sampling is called:
(i) cluster
(ii) convenience
(iii.
This is an open-book exam. You may refer to your text and other .docxchristalgrieg
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your supporting work and reasoning. Answers that come straight from calculators, programs or software packages without any explanation will not be accepted. If you need to use technology (for example, Excel, online or hand- held calculators, statistical packages) to aid in your calculation, you must cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 100 total points; 5 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam. Exams submitted without the Honor Pledge will not be accepted.
Page 1 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A OR Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be identical.
(c) If a 95% confidence interval for a population mean contains 1, then the 99% confidence interval for the same parameter must contain 1
(d) When plotted on the same graph, a distribution with a mean of 60 and a standard deviation of 5 will look more spread out than a distribution with a mean of 40 and standard deviation of 8.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a distribution with the distribution curve shown below. If we know the shaded area is 0.03, then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) A study was conducted at a local college to analyze the average GPA of students graduated from UMUC in 2015. 100 students graduated from UMUC in 2015 were randomly selected, and the average GPA for the group is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) In a career readiness research, 100 students were randomly selected from the psychology program, 150 students were randomly selected from the communications program, and 120 students were randomly selected from cyber security program. This type of sampling is called:
(i) cluster
(ii) convenience
(iii) systematic
(iv) stratified
3. Choose the best answer. Justify for full credit.
(a) A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. ...
STAT 200 Introduction to Statistics Final Examination, Fa.docxwhitneyleman54422
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL4 Page 1 of 8
STAT 200
OL4 / US2 Sections
Final Exam
Fall 2016
The final exam will be posted at 12:01 am on December 16, and it
is due at 11:59 pm on December 18, 2016. Eastern Time is our
reference time.
This is an open-book exam. You may refer to your text and other course materials
as you work on the exam, and you may use a calculator. You must complete the
exam individually. Neither collaboration nor consultation with others is allowed.
It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use
unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible.
Show all of your supporting work and reasoning. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 100 total points; 5 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL4 Page 2 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A AND Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) If a 95% confidence interval for a population mean contains 1, then the 90% confidence
interval for the same parameter must contain 1
(d) When plotted on the same graph, a distribution with a mean of 40 and a standard deviation
of 10 will look more spread out than a distribution with a mean of 50 and standard
deviation of 5.
(e) In a two-tailed test, the value of a test statistic is 2. The test statistic follows a distribution
with the distribution curve shown below. If we know the shaded area is 0.03, then we have
sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) A study was conducted at a local college to analyze the average GPA of students graduated
from UMUC in 2015. 100 students graduated from UMUC in 2015 were randomly selected,
and the average GPA for the group is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) On the Election Day, UMUC News Club organized an exit poll .
STAT 200 Introduction to Statistics Page 1 of91. True or .docxwhitneyleman54422
STAT 200: Introduction to Statistics Page 1 of9
1. True or False. Show work.
(a) If A and B are disjoint, peA) = 0.4 and PCB) = 0.5, then peA OR B) = 0.9.
(b) If the variance for a data set is zero, then all the observations in this data set must be
identicaL
(c) There may be more than one mode in a data set.
(d) A 90% confidence interval is wider than a 95% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a
distribution with the distribution curve shown below. If we know the shaded area is 0.03,
then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Show work.
(a) UMUC STAT Club wanted to estimate the study hours of STAT 200 students. One STAT 200
section was randomly selected and all students from that section were asked to fill out the
questionnaire. This type of sampling is called:
(i) cluster
(ii) convenience
(iii) systematic
(iv) stratified
STAT 200: Introduction to Statistics Page 2 of9
(b) A study was conducted at a local college to analyze the trend of average GPA of all students
graduated from the college. According to the Registrar, the average GPA for students with
economics major from the class of2016 is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
STAT 200: Introductionto Statistics Page 3 of9
(c) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(d) 500 students took a chemistry test. You sampled 100 students to estimate the average score and
the standard deviation. How many degrees of freedom were there in the estimation of the
standard deviation?
(i) 99
(ii) 100
(iii) 499
(iv) 500
(e) You choose an alpha level of 0.01 and then analyze your data. What is the probability that you will
make a Type Ierror given that the null hypothesis is true?
(i) 0.025
(ii) 0.05
(iii) 0.01
(iv) 0.10
STAT 200: Introduction to Statistics Page 4 of9
3. A random sample of 500 students was chosen from UMUC STAT 200 classes. The frequency
distribution below shows the distribution for study time each week (in hours). Show work.
Study Time (in hours) Frequency Relative Frequency
0.0-5.0 40
5.1-10.0 100
10.1-15.0 0.25
15.1- 20.0 120
20.1- 25.0
Total 500
(a) Complete the frequency table with frequency and relative frequency. Express the relative
frequency to two decimal places.
(b) What percentage of the study times was not more than 15 hours?
(c) In what class interval must the median lie? 5.1-10.0, 10.1 -15.0, 15.1- 20.0, or 20.1 - 25.0?
Why?
STAT 200: Introduction to Statistics Page 5 of9
4. The five-number summary below shows the grade distribution of a STAT 200 quiz for a
sample of 500 students.
20 45 65 75 tOO
o /0 20 30 40 50 60 70 80 90 100
Answer each question based on the given information, and explain your answer in each
ca.
STAT 200 Introduction to Statistics Final Examination, Spri.docxrafaelaj1
STAT 200: Introduction to Statistics
Final Examination, Spring 2019 OL3
Page 1 of 8
STAT 200
OL3 Sections
Final Exam
Spring 2019
The final exam will be posted at 12:01 am on April 19, 2019, and
it is due at 11:59 pm on April 21, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized materials or work from
others.
Answer all 20 questions. Make sure your answers are as complete as possible,
particularly when it asks for you to show your work. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results. For example, state the Excel function
along with the required parameters when using Excel; describe the detailed steps
when using a hand-held calculator; or provide the URL and detailed steps when
using an online calculator, and so on.
Record your answers and work on the separate answer sheet provided.
This exam has 20 problems; 5% for each problems.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics
Final Examination, Spring 2019 OL3
Page 2 of 8
1. You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. To
estimate the mean, you collect data from 28 heart patients. Justify for full credit.
(a) Which of the followings is the sample?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two
days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
(b) Which of the followings is the variable?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two
days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
2. In order to collect data on the number of courses that your classmates take in this semester, you plan
on asking them: “How many UMUC courses are you taking in this semester? “Justify for full credit.
(a) Which type of d.
1. True or False. Justify for full credit. .docxKiyokoSlagleis
1.
True or False.
Justify for full credit.
(15 pts)
(a) If the variance of a data set is zero, then all the observations in this data set are zero.
(b) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.9.
(c) Assume X follows a continuous distribution which is symmetric about 0. If , then .
(d) A 95% confidence interval is wider than a 90% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 1.5. If we know the test statistic
follows a Student’s t
-distribution with P(T < 1.5) = 0.96, then we fail to reject the null hypothesis at 0.05 level of significance .
Refer to the following frequency distribution for Questions 2, 3, 4, and 5.
Show all work. Just the answer, without supporting work, will receive no credit.
The frequency distribution below shows the distribution for checkout time (in minutes) in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon.
Checkout Time (in minutes)
Frequency
Relative Frequency
1.0 - 1.9
3
2.0 - 2.9
12
3.0 - 3.9
0.20
4.0 - 4.9
3
5.0 -5.9
Total
25
2.
Complete the frequency table with frequency and relative frequency. Express the relative frequency to two decimal places. (5 pts)
3.
What percentage of the checkout times was at least 3 minutes? (3 pts)
4.
In what class interval must the median lie? Explain your answer. (5 pts)
5.
Does this distribution have positive skew or negative skew? Why? (2 pts)
Refer to the following information for Questions 6 and 7.
Show all work. Just the answer, without supporting work, will receive no credit.
Consider selecting one card at a time from a 52-card deck. (Note: There are 4 aces in a deck of cards)
6.
If the card selection is without replacement, what is the probability that the first card is an ace and the second card is also an ace? (Express the answer in simplest fraction form) (5 pts)
STAT 200: Introduction to Statistics Final Examination, Fall 2015 OL1/US1 Page 3 of 6
7.
If the card selection is with replacement, what is the probability that the first card is an ace and the second card is also an ace? (Express the answer in simplest fraction form) (5 pts)
Refer to the following situation for Questions 8, 9, and 10.
The five-number summary below shows the grade distribution of two STAT 200 quizzes for a sample of 500 students.
Minimum
Q1
Median
Q3
Maximum
Quiz 1
15
45
55
85
100
Quiz 2
20
35
50
90
100
For each question, give your answer as one of the following: (a) Quiz 1; (b) Quiz 2; (c) Both quizzes have the same value requested; (d) It is impossible to tell using only the given information. Then
explain
your answer in
each
case.
(4 pts each)
8.
Which quiz has less interquartile range in grade distribution?
9.
Which quiz has the greater percentage of students with grades 90 and over?
10.
Which quiz has a greater percentage of students with grades less than 60?
Refer to the following informati.
STAT 200 Final ExaminationFall 2016 OL3Page 4 of 9Answer all 2.docxwhitneyleman54422
STAT 200 Final ExaminationFall 2016 OL3Page 4 of 9
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
(c)
(d)
(e)
Justification:
2
Answer:
(a)
(b)
(c)
Justification:
3
Answer:
(a)
(b)
Justification:
4
Answer:
(a)
IQ Scores
Frequency
Relative Frequency
50 - 69
23
70 - 89
0.250
90 -109
450
110 - 129
130 - 149
23
Total
1000
(b)
(c)
Work for (a) and (b):
5
Answer:
(a)
(b)
(c)
Justification:
6
Answer:
(a)
(b)
Work for (a) and (b):
7
Answer:
(a)
(b)
Work for (b):
8
Answer:
(a)
(b)
Work for (a) and (b):
9
Answer:
(a)
(b)
Work for (a) and (b):
10
Answer:
Work:
11
Answer:
(a)
(b)
Work for (b) :
12
Answer:
(a)
(b)
Work for (a) and (b):
13
Answer:
(a)
(b)
Work for (a) and (b):
14
Answer:
Work:
15
Answer:
Work:
16
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
17
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
18
Answers:
(a)
(b)
(c)
(d).
Work for (b) and (c):
19
Answer:
(a)
(b)
(c)
(d)
Work for (b) and (c):
20
Answer:
(a)
(b)
Work for (a) and (b):
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL3 Page 2 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A AND Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) If a 95% confidence interval for a population mean contains 1, then the 99% confidence
interval for the same parameter must contain 1
(d) When plotted on the same gra.
STAT 200 Introduction to Statistics Final Examination, Su.docxwhitneyleman54422
STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL2 Page 1 of 8
STAT 200
OL2 Sections
Final Exam
Summer 2016
The final exam will be posted at 12:01 am on July 22, and it is due
at 11:59 pm on July 24, 2016. Eastern Time is our reference time.
This is an open-book exam. You may refer to your text and other course materials
as you work on the exam, and you may use a calculator. You must complete the
exam individually. Neither collaboration nor consultation with others is allowed.
It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use
unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible.
Show all of your supporting work and reasoning. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 200 total points; 10 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics Final Examination, Summer 2016 OL2 Page 2 of 8
1. True or False. Justify for full credit.
(a) If P(A) = 0.4, P(B) = 0.5, and A and B are independent, then P(A AND B) = 0.2.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) The mean is always equal to the median for a normal distribution.
(d) A 90% confidence interval is wider than a 95% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a distribution
with the distribution curve shown below. If we know the shaded area is 0.96, then we have
sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) UMUC Stat Club conducted a survey on STAT 200 study hours. The survey result showed
that 54% of the respondents spent more than 20 hours each week on STAT 200. The value
54% is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) UMUC STAT Club wanted to estimate the study hours of STAT 200 students. Two STAT 200
sections were randomly selected and all students from these two sections were asked to fill out
the questionnaire. This type of sampling is called:
(i) cluster
(ii) convenience
(iii.
This is an open-book exam. You may refer to your text and other .docxchristalgrieg
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator. You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your supporting work and reasoning. Answers that come straight from calculators, programs or software packages without any explanation will not be accepted. If you need to use technology (for example, Excel, online or hand- held calculators, statistical packages) to aid in your calculation, you must cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 100 total points; 5 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam. Exams submitted without the Honor Pledge will not be accepted.
Page 1 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A OR Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be identical.
(c) If a 95% confidence interval for a population mean contains 1, then the 99% confidence interval for the same parameter must contain 1
(d) When plotted on the same graph, a distribution with a mean of 60 and a standard deviation of 5 will look more spread out than a distribution with a mean of 40 and standard deviation of 8.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a distribution with the distribution curve shown below. If we know the shaded area is 0.03, then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) A study was conducted at a local college to analyze the average GPA of students graduated from UMUC in 2015. 100 students graduated from UMUC in 2015 were randomly selected, and the average GPA for the group is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) In a career readiness research, 100 students were randomly selected from the psychology program, 150 students were randomly selected from the communications program, and 120 students were randomly selected from cyber security program. This type of sampling is called:
(i) cluster
(ii) convenience
(iii) systematic
(iv) stratified
3. Choose the best answer. Justify for full credit.
(a) A study of 10 different weight loss programs involved 500 subjects. Each of the 10 programs had 50 subjects in it. The subjects were followed for 12 months. ...
STAT 200 Introduction to Statistics Final Examination, Fa.docxwhitneyleman54422
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL4 Page 1 of 8
STAT 200
OL4 / US2 Sections
Final Exam
Fall 2016
The final exam will be posted at 12:01 am on December 16, and it
is due at 11:59 pm on December 18, 2016. Eastern Time is our
reference time.
This is an open-book exam. You may refer to your text and other course materials
as you work on the exam, and you may use a calculator. You must complete the
exam individually. Neither collaboration nor consultation with others is allowed.
It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use
unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as complete as possible.
Show all of your supporting work and reasoning. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results.
Record your answers and work on the separate answer sheet provided.
This exam has 100 total points; 5 points for each question.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics Final Examination, Fall 2016 OL4 Page 2 of 8
1. True or False. Justify for full credit.
(a) A is an event, and Ac is the complement of A, then P(A AND Ac ) = 0.
(b) If the variance of a data set is 0, then all the observations in this data set must be zero.
(c) If a 95% confidence interval for a population mean contains 1, then the 90% confidence
interval for the same parameter must contain 1
(d) When plotted on the same graph, a distribution with a mean of 40 and a standard deviation
of 10 will look more spread out than a distribution with a mean of 50 and standard
deviation of 5.
(e) In a two-tailed test, the value of a test statistic is 2. The test statistic follows a distribution
with the distribution curve shown below. If we know the shaded area is 0.03, then we have
sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Justify for full credit.
(a) A study was conducted at a local college to analyze the average GPA of students graduated
from UMUC in 2015. 100 students graduated from UMUC in 2015 were randomly selected,
and the average GPA for the group is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
(b) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(c) On the Election Day, UMUC News Club organized an exit poll .
STAT 200 Introduction to Statistics Page 1 of91. True or .docxwhitneyleman54422
STAT 200: Introduction to Statistics Page 1 of9
1. True or False. Show work.
(a) If A and B are disjoint, peA) = 0.4 and PCB) = 0.5, then peA OR B) = 0.9.
(b) If the variance for a data set is zero, then all the observations in this data set must be
identicaL
(c) There may be more than one mode in a data set.
(d) A 90% confidence interval is wider than a 95% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 2. The test statistic follows a
distribution with the distribution curve shown below. If we know the shaded area is 0.03,
then we have sufficient evidence to reject the null hypothesis at 0.05 level of significance.
2. Choose the best answer. Show work.
(a) UMUC STAT Club wanted to estimate the study hours of STAT 200 students. One STAT 200
section was randomly selected and all students from that section were asked to fill out the
questionnaire. This type of sampling is called:
(i) cluster
(ii) convenience
(iii) systematic
(iv) stratified
STAT 200: Introduction to Statistics Page 2 of9
(b) A study was conducted at a local college to analyze the trend of average GPA of all students
graduated from the college. According to the Registrar, the average GPA for students with
economics major from the class of2016 is 3.5. The value 3.5 is a
(i) statistic
(ii) parameter
(iii) cannot be determined
STAT 200: Introductionto Statistics Page 3 of9
(c) The hotel ratings are usually on a scale from 0 star to 5 stars. The level of this measurement is
(i) interval
(ii) nominal
(iii) ordinal
(iv) ratio
(d) 500 students took a chemistry test. You sampled 100 students to estimate the average score and
the standard deviation. How many degrees of freedom were there in the estimation of the
standard deviation?
(i) 99
(ii) 100
(iii) 499
(iv) 500
(e) You choose an alpha level of 0.01 and then analyze your data. What is the probability that you will
make a Type Ierror given that the null hypothesis is true?
(i) 0.025
(ii) 0.05
(iii) 0.01
(iv) 0.10
STAT 200: Introduction to Statistics Page 4 of9
3. A random sample of 500 students was chosen from UMUC STAT 200 classes. The frequency
distribution below shows the distribution for study time each week (in hours). Show work.
Study Time (in hours) Frequency Relative Frequency
0.0-5.0 40
5.1-10.0 100
10.1-15.0 0.25
15.1- 20.0 120
20.1- 25.0
Total 500
(a) Complete the frequency table with frequency and relative frequency. Express the relative
frequency to two decimal places.
(b) What percentage of the study times was not more than 15 hours?
(c) In what class interval must the median lie? 5.1-10.0, 10.1 -15.0, 15.1- 20.0, or 20.1 - 25.0?
Why?
STAT 200: Introduction to Statistics Page 5 of9
4. The five-number summary below shows the grade distribution of a STAT 200 quiz for a
sample of 500 students.
20 45 65 75 tOO
o /0 20 30 40 50 60 70 80 90 100
Answer each question based on the given information, and explain your answer in each
ca.
STAT 200 Introduction to Statistics Final Examination, Spri.docxrafaelaj1
STAT 200: Introduction to Statistics
Final Examination, Spring 2019 OL3
Page 1 of 8
STAT 200
OL3 Sections
Final Exam
Spring 2019
The final exam will be posted at 12:01 am on April 19, 2019, and
it is due at 11:59 pm on April 21, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized materials or work from
others.
Answer all 20 questions. Make sure your answers are as complete as possible,
particularly when it asks for you to show your work. Answers that come straight
from calculators, programs or software packages without any explanation will not
be accepted. If you need to use technology (for example, Excel, online or hand-
held calculators, statistical packages) to aid in your calculation, you must cite the
sources and explain how you get the results. For example, state the Excel function
along with the required parameters when using Excel; describe the detailed steps
when using a hand-held calculator; or provide the URL and detailed steps when
using an online calculator, and so on.
Record your answers and work on the separate answer sheet provided.
This exam has 20 problems; 5% for each problems.
You must include the Honor Pledge on the title page of your submitted final exam.
Exams submitted without the Honor Pledge will not be accepted.
STAT 200: Introduction to Statistics
Final Examination, Spring 2019 OL3
Page 2 of 8
1. You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. To
estimate the mean, you collect data from 28 heart patients. Justify for full credit.
(a) Which of the followings is the sample?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two
days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
(b) Which of the followings is the variable?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two
days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
2. In order to collect data on the number of courses that your classmates take in this semester, you plan
on asking them: “How many UMUC courses are you taking in this semester? “Justify for full credit.
(a) Which type of d.
1. True or False. Justify for full credit. .docxKiyokoSlagleis
1.
True or False.
Justify for full credit.
(15 pts)
(a) If the variance of a data set is zero, then all the observations in this data set are zero.
(b) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then P(A AND B) = 0.9.
(c) Assume X follows a continuous distribution which is symmetric about 0. If , then .
(d) A 95% confidence interval is wider than a 90% confidence interval of the same parameter.
(e) In a right-tailed test, the value of the test statistic is 1.5. If we know the test statistic
follows a Student’s t
-distribution with P(T < 1.5) = 0.96, then we fail to reject the null hypothesis at 0.05 level of significance .
Refer to the following frequency distribution for Questions 2, 3, 4, and 5.
Show all work. Just the answer, without supporting work, will receive no credit.
The frequency distribution below shows the distribution for checkout time (in minutes) in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon.
Checkout Time (in minutes)
Frequency
Relative Frequency
1.0 - 1.9
3
2.0 - 2.9
12
3.0 - 3.9
0.20
4.0 - 4.9
3
5.0 -5.9
Total
25
2.
Complete the frequency table with frequency and relative frequency. Express the relative frequency to two decimal places. (5 pts)
3.
What percentage of the checkout times was at least 3 minutes? (3 pts)
4.
In what class interval must the median lie? Explain your answer. (5 pts)
5.
Does this distribution have positive skew or negative skew? Why? (2 pts)
Refer to the following information for Questions 6 and 7.
Show all work. Just the answer, without supporting work, will receive no credit.
Consider selecting one card at a time from a 52-card deck. (Note: There are 4 aces in a deck of cards)
6.
If the card selection is without replacement, what is the probability that the first card is an ace and the second card is also an ace? (Express the answer in simplest fraction form) (5 pts)
STAT 200: Introduction to Statistics Final Examination, Fall 2015 OL1/US1 Page 3 of 6
7.
If the card selection is with replacement, what is the probability that the first card is an ace and the second card is also an ace? (Express the answer in simplest fraction form) (5 pts)
Refer to the following situation for Questions 8, 9, and 10.
The five-number summary below shows the grade distribution of two STAT 200 quizzes for a sample of 500 students.
Minimum
Q1
Median
Q3
Maximum
Quiz 1
15
45
55
85
100
Quiz 2
20
35
50
90
100
For each question, give your answer as one of the following: (a) Quiz 1; (b) Quiz 2; (c) Both quizzes have the same value requested; (d) It is impossible to tell using only the given information. Then
explain
your answer in
each
case.
(4 pts each)
8.
Which quiz has less interquartile range in grade distribution?
9.
Which quiz has the greater percentage of students with grades 90 and over?
10.
Which quiz has a greater percentage of students with grades less than 60?
Refer to the following informati.
STAT 200 Final ExaminationFall 2016 OL1US1Page 9 of 9STAT 200.docxwhitneyleman54422
STAT 200 Final ExaminationFall 2016 OL1/US1Page 9 of 9
STAT 200 Introduction to Statistics Name______________________________
Final Examination: Fall 2016 OL1/US1 Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. Your exam will receive a zero grade unless you complete the following honor statement.
Please sign (or type) your name below the following honor statement:
I understand that it is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name _____________________Date___________________
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
(c)
(d)
(e)
Justification:
2
Answer:
(a)
(b)
(c)
Justification:
3
Answer:
(a)
(b)
Justification:
4
Answer:
(a)
IQ Scores
Frequency
Relative Frequency
50 - 69
23
70 - 89
249
90 -109
0.450
110 - 129
130 - 149
25
Total
1000
(b)
(c)
Work for (a) and (b):
5
Answer:
(a)
(b)
(c)
Justification:
6
Answer:
(a)
(b)
Work for (a) and (b):
7
Answer:
(a)
(b)
Work for (b):
8
Answer:
(.
Answer all 20 questions. Make sure your answers are as complet.docxfestockton
Answer all 20 questions. Make sure your answers are as complete as possible, particularly when it asks for you to show
your work. Answers that come straight from calculators, programs or software packages without any explanation will
not be accepted. If you need to use technology (for example, Excel, online or hand-held calculators, statistical packages)
to aid in your calculation, you must cite the sources and explain how you get the results. For example, state the Excel
function along with the required parameters when using Excel; describe the detailed steps when using a hand-held
calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Record your answers and work on the separate answer sheet provided.
This exam has 20 problems; 5% for each problems.
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1. You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. To estimate the
mean, you collect data from 28 heart patients. Justify for full credit.
(a) Which of the followings is the sample?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
(b) Which of the followings is the variable?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
2. Choose the best answer. Justify for full credit.
(a) The Knot.com surveyed nearly 13,000 couples, who married in 2017, and asked how much they spent on their
wedding. The average amount of money spent on was $33,391. The value $33,391 is a:
(i) parameter
(ii) statistic
(iii) cannot be determined from information provided.
(b) A marketing agent asked people to rank the quality of a new soap on a scale from 1 (poor) to 5 (excellent). The level
of this measurement is
(i) nominal
(ii) ordinal
(iii) interval
(iv) ratio
3. True or False. Justify for full credit.
(a) If the variance from a data set is zero, then all the observations in this data set must be identical.
(b) The median of a normal distribution curve is always zero.
4. A STAT 200 student is interested in the number of credit cards owned by college students. She surveyed all of her
classmates to collect sample data.
(a) What type of sampling method is being used?
(b) Please explain your answer.
5. A study was conducted to determine whether the mean braking distance of four-cylinder cars is greater than th ...
Answer SheetInstructions This is an open-book exam. Yo.docxfestockton
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
Justification for (a) and (b):
2
Answer:
(a)
(b)
Justification for (a) and (b):
3
Answer:
(a)
(b)
Justification for (a) and (b):
4
Answer:
(a)
(b)
5
Answer:
(a)
(b)
6
Answer:
(a)
(b)
7
Answer:
(a)
(b)
(c)
Work for (a) and (b):
8
Answer:
(a)
(b)
9
Answer:
(a)
(b)
10
Answer:
(a)
(b)
11
Answer:
(a)
(b)
12
Answer:
(a) n = , p = , and q = .
(b)
(c)
13
Answer:
(a)
(b)
14
Answer:
(a)
(b)
15
Answer:
(a)
(b)
16
Answer:
(a)
(b)
17
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
18
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
19
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
20
Answers:
(a)
(b)
(c)
(d)
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1
STAT 200
OL1 Sections
Final Exam
Fall 2019
The final exam will be posted at 12:01 am on October 11, 2019, and
it is due at 11:59 pm on October 13, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized ma ...
STAT 225 Final ExaminationSummer 2015 OL1US1Page 1 of 10STAT .docxdessiechisomjj4
STAT 225 Final ExaminationSummer 2015 OL1/US1Page 1 of 10
STAT 225 Introduction to Statistical Methods for the Behavioral Science
Final Examination: Summer 2015 OL1 / US1Name______________________________
Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 25 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from programs or software packages will not be accepted. If you need to use software (for example, Excel) and /or online or hand-held calculators to aid in your calculation, please cite the source and explain how you get the results.
When requested, show all work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Your exam will receive a zero grade unless you complete the following honor statement.
Please sign (or type) your name below the following honor statement:
I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name _____________________Date___________________
Record your answers and work.
Problem Number
Solution
1
(25 pts)
Answers:
(a)
(b)
(c)
(d)
(e)
Work for (a), (b), (c), (d) and (e):
2
(5 pts)
Answer:
Study Time (in hours)
Frequency
Relative Frequency
0.0 – 4.9
5
5.0 - 9.9
13
10.0 - 14.9
0.22
15.0 -19.9
42
20.0 – 24.9
Total
100
Work:
3
(5 pts)
Answer:
Work:
4
(5 pts)
Answer:
Work:
5
(5 pts)
Answer:
Work:
6
(5 pts)
Answer:
Work:
7
(10 pts)
Answer:
Work:
8
(5 pts)
Answer:
Work:
9
(5 pts)
Answer:
Work:
10
(5 pts)
Answer:
Work:
11
(5 pts)
Answer:
Work:
12
(10 pts)
Answer:
Work:
13
(10 pts)
Answer:
Work:
14
(5 pts)
Answer:
Work:
15
(15 pts)
Answer:
(a)
x
P(x)
0
1
2
3
(b) mean = __________ , and standard deviation = _____________
Work for (a) and (b):
16
(20 pts)
Answer:
(a)
(b)
(c)
Work for (a), (b) and (c) :
17
(10 pts)
Answer:
Work:
18
(5 pts)
Answer:
Work:
19
(5 pts)
Answer:
Work:
20
(10 pts)
Answer:
Work:
21
(15 pt.
STAT 200 Final ExaminationFall 2019 OL1Page 1 of 11Answer .docxsusanschei
STAT 200 Final Examination
Fall 2019 OL1
Page 1 of 11
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
Justification for (a) and (b):
2
Answer:
(a)
(b)
Justification for (a) and (b):
3
Answer:
(a)
(b)
Justification for (a) and (b):
4
Answer:
(a)
(b)
5
Answer:
(a)
(b)
6
Answer:
(a)
(b)
7
Answer:
(a)
(b)
(c)
Work for (a) and (b):
8
Answer:
(a)
(b)
9
Answer:
(a)
(b)
10
Answer:
(a)
(b)
11
Answer:
(a)
(b)
12
Answer:
(a) n = , p = , and q = .
(b)
(c)
13
Answer:
(a)
(b)
14
Answer:
(a)
(b)
15
Answer:
(a)
(b)
16
Answer:
(a)
(b)
17
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
18
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
19
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
20
Answers:
(a)
(b)
(c)
(d)
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1
STAT 200
OL1 Sections
Final Exam
Fall 2019
The final exam will be posted at 12:01 am on October 11, 2019, and
it is due at 11:59 pm on October 13, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized materials or work from
others.
Answer all 20 questions. Mak.
Stat 230 Summer 2014 – Final Exam Page 1 .docxdessiechisomjj4
Stat 230 Summer 2014 – Final Exam
Page 1
Please answer all 30 questions. Make sure your answers are as complete as
possible. Show all of your work and reasoning. In particular, when there are
calculations involved, you must show how you come up with your answers
with critical work and/or necessary tables. Answers that come straight from
program software packages will not be accepted.
You must include the Honor Pledge on the title page of your
submitted final exam. Exam submitted without the Honor
Pledge will not be accepted.
Honor Pledge: "I have completed this final examination myself, working independently
and not consulting anyone except the instructor. I have neither given nor received help on this
final examination."
Use the information below to answer Questions 1 through 3.
Given a sample size of 34, with sample mean 660.3 and sample standard deviation 104.9, we
perform the following hypothesis test. Since n>30, this is a Z test.
Null Hypothesis 0 : 700H
Alternative Hypothesis : 700aH
1. What is the test statistic? What is the p-value?
2. At a 5% significance level (95% confidence level), what is the critical value(s) in this
test? Do we reject the null hypothesis?
3. What are the border values of x between acceptance and rejection of this hypothesis?
Stat 230 Summer 2014 – Final Exam
Page 2
Questions 4 through 7 involve rolling of dice.
4. Given a fair, six-sided die, what is the probability of rolling the die twice and getting a
“1” each time?
5. What is the probability of getting a “1” on the second roll when you get a “1” on the first
roll?
6. The House managed to load the die in such a way that the faces “2” and “4” show up
twice as frequently as all other faces. Meanwhile, all the other faces still show up with
equal frequency. What is the probability of getting a “5” when rolling this loaded die?
7. Write the probability distribution for this loaded die, showing each outcome and its
probability.
Use the data in the table to answer Questions 8 through 9.
x 3 1 4 4 5
y 2 -2 5 4 8
8. Determine SSxx, SSxy, and SSyy.
9. Find the equation of the regression line. What is the predicted value when 4?x
Stat 230 Summer 2014 – Final Exam
Page 3
Use the data below to answer Questions 10 through 12.
A group of students from three universities were asked to pick their favorite college sport
to attend of their choice: The results, in number of students, are listed as follows:
Football Basketball Soccer
Maryland 60 70 20
Duke 10 75 15
UCLA 35 65 25
Supposed that a student is randomly selected from the group mentioned above.
10. What is the probability that the student is from UCLA or chooses football?
11. What is the probability that the student is from Duke, given that the student chooses
basketball?
12. What is the probability that the .
1. True or False. Justify for full credit.(10 pts)(a) The .docxjackiewalcutt
1. True or False. Justify for full credit.
(10 pts)
(a) The normal distribution curve is always symmetric to its mean.
(b) If the variance from a data set is zero, then all the observations in this data set are identical.
(c)
P(A AND Ac )
1, where Ac is the complement of A.
(d) In a hypothesis testing, if the p-value is less than the significance level α, we do not have sufficient evidence to reject the null hypothesis.
(e) The volume of milk in a jug of milk is 128 oz. The value 128 is from a discrete data set.
Refer to the following frequency distribution for Questions 2, 3, 4, and 5. Show all work. Just the answer, without supporting work, will receive no credit.A random sample of 25 customers was chosen in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon. The frequency distribution below shows the distribution for checkout time (in minutes).
Checkout Time (in minutes)
Frequency
Relative Frequency
1.0 - 1.9
2
2.0 - 2.9
8
3.0 - 3.9
4.0 - 5.9
5
Total
25
2. Complete the frequency table with frequency and relative frequency.
(1 pt)
3. What percentage of the checkout times was less than 3 minutes?
(1pt)
4. In what class interval must the median lie? Explain your answer.
(1 pt)
5. Assume that the largest observation in this dataset is 5.8. Suppose this observation were incorrectly recorded as 8.5 instead of 5.8. Will the mean increase, decrease, or remain the same? Will the median increase, decrease or remain the same? Why?
(1 pt)
6. A random sample of STAT200 weekly study times in hours is as follows: 2 15 15 18 30
Find the sample standard deviation. (Round the answer to two decimal places. Show all work. Just the answer, without supporting work, will receive no credit.)
(1 pt)
Refer to the following information for Questions 7, 8, and 9. Show all work. Just the answer, without supporting work, will receive no credit.A fair coin is tossed 4 times.
7. How many outcomes are there in the sample space?
(5 pts)
8. What is the probability that the third toss is heads, given that the first toss is heads? (5 pts)
9. Let A be the event that the first toss is heads, and B be the event that the third toss is heads. Are A
and B independent? Why or why not?
(5 pts)
Refer to the following situation for Questions 10, 11, and 12.
The boxplots below show the real estate values of single family homes in two neighboring cities, in thousands of dollars.
For each question, give your answer as one of the following: (a) Tinytown; (b) BigBurg; (c) Both cities have the same value requested; (d) It is impossible to tell using only the given information. Then explain your answer in each case.
(5 pts each)
10. Which city has greater variability in real estate values?
11. Which city has the greater percentage of households with values $85,000 and over?
12. Which city has a greater percentage of homes with real estate values between $55,000 and $85,000?
Refer to the following information for Questions 13 and 14. Show all work. Just ...
Question 1 In your own words, write a minimum of three sen.docxIRESH3
Question 1
In your own words, write a minimum of three sentences describing the Ashcan school.
Question 2
The new modern artists, such as the Ashcan artist, rejected which American era:
A.
The Age of Enlightenment
B.
The Neoclassical Age
C.
The Gilded Age
D.
The Impressionist Age
Question 3
Robert Henri was a progressive artist. He studied at the Ecole de Beaux Arts in Paris, was influenced by the Impressionists, and even helped organize the Armory Show. However, he was opposed to American artists creating art that too closely followed European styles. What were his opinions when contemplating the idea of a National American Art?
Question 4
Read the text on Marsden Hartley on page 66 of our text. Review his image Portrait of a German Officer and give a two paragraph reaction essay.
Question 5
According to our text, Blank 1 was the first (short lived) non-objective, non-representational modern American art movement.
Question 6
Alfred Stieglitz ran an American gallery from 1908-1917 called Blank 1 . He dedicated this exhibition space to showing avant-garde artists such as John Marin and Arthur Dove.
Question 7
Write a formal analysis of the painting by George Bellows entitled Both Members of this Club, 1909. Start by listing the title, artist, and date of the artwork. Next, imagine that you are writing a letter to a friend who has never seen the painting. Describe the painting in detail. Be sure to analyze the lines, colors, textures, space, and shapes you see in the painting. Finally, write an interpretation of the painting--in other words, explain what the painting says or communicates to you. What function, purpose or idea does the painting represent? You can see an example of this method of analysis at Goya Analysis at http://www.artmuseums.com/goya.htm.
Art analysis question should be no less than 2 or 3 well developed paragraphs.
Question 8
Who was not in the Stieglitz circle of artists?
A.
Arthur Dove
B.
Marsden Hartley
C.
Joseph Stella
D.
Georgia O’Keeffe
Question 9
What was “Fountain” by Marcel Duchamp (R. Mutt)?
Question 10
The artist Blank 1 made paintings that were rejected from the National Academy exhibition. He went on to teach artists to paint with intensity and emotion, and capture the ‘spirit’ of the people and cities of their urban world?
Question 11
According to our text, what was the key difference between Henri and Stieglitz?
Question 12
Which group held an exhibit at the Macbeth Gallery that set America on a course of Modern Art?
STAT 200: Introduction to Statistics Final Examination, Fall 2015 OL1/US1 Page 1 of 6
STAT 200
OL1/US1 Sections
Final Exam
Fall 2015
The final exam will be posted at 12:01 am on October 9, and it
is due at 11:59 pm on October 11, 2015. Eastern Time is our
reference time.
This is an open-book exam. You may refer to your text and other course
materials as you work on the exam, and you may use a calculator. You ...
Part 1 Please circle the correct answer.1. Which of t.docxherbertwilson5999
Part 1: Please circle the correct answer.
1. Which of the following is most sensitive to outliers?
a. interquartile range b.standard deviation. c. median
d. mode
2. James and George took a math exam. George’s percentile score on the exam was 80; James’s
percentile score was 40 on the same test. We know that
a) George correctly answered twice as many questions than James. b) They both scored better than 40 of their classmates.
c) George correctly answered more questions than James. d) James did not pass the test.
3. Find the mean and standard deviation for a binomial experiment where n 260,
p 0.675 .
a) 260 , b) 260 ,
7.55
57.04
c) 175.50 ,
7.55
d) 97.50 ,
e) 175.50 ,
13.25
9.19
4. If we were to create a box plot, which of the following statement(s) would be true?
A. The median would be located somewhere within the box.
B. The median value would be larger than the third quartile value (Q3) C. The median would always be centered in the middle of the box.
D. The median would indicate where the 50th percentile would be.
a) A and B
b) All of them. c) A and D
d) C and D.
e) None of them.
5. Which of these statements are false?
a. There is a strong linear relationship between gender and height because we found a correlation of .55.
b. Plant height and leaf height were found to be negatively correlated because the correlation coefficient is -1.41.
c. Since the correlation between X and Y is 0, this means there is no relationship whatsoever between these two variables.
d. All of the above.
e. None of the above.
6. Some methods may be used to make a confidence interval wider or narrower. Circle the two
methods that would decrease the width of a confidence interval for a mean, if all else stays the same.
a. Increase the sample size. b. decrease the sample size.
c. increase the level of confidence. d. decrease the level of confidence.
7. Two researchers are going to take a sample of data from the same population of physics students. Researcher A will select a random sample of students from among all students taking physics. Researcher B's sample will consist only of the students in her class. Both researchers will construct a 95% confidence interval for the mean score on the physics final exam using their own sample data. Which researcher's method has a 95% chance of capturing the true mean of the population of all students taking physics?
a. Both methods have a 95% chance of capturing the true mean b. Researcher A
c. Research B
d. Neither
8. A 98% confidence interval indicates that:
a. 98% of the intervals constructed using this process based on samples from this population will include the population mean
b. 98% of the time the interval will include the sample mean
c. 98% of the possible population means will be included by the interval
9. A one-tailed hypothesis test is performed using a 0.10 level of significance. .
InstructionDue Date 6 pm on October 28 (Wed)Part IProbability a.docxdirkrplav
InstructionDue Date: 6 pm on October 28 (Wed)
Part IProbability and Sampling Distributions1.Thinking about probability statements. Probability is measure of how likely an event is to occur. Match one of probabilities that follow with each statement of likelihood given (The probability is usually a more exact measure of likelihood than is the verbal statement.)Answer0 0.01 0.3 0.6 0.99 1(a) This event is impossible. It can never occur.(b) This event is certain. It will occur on every trial.(c) This event is very unlikely, but it will occur once in a while in a long sequence of trials.(d) This event will occur more often that not.2. Spill or Spell? Spell-checking software catches "nonword errors" that result in a string of letters that is not a word, as when "the" is typed as "the." When undergraduates are asked to write a 250-word essay (without spell-checking), the number X of nonword errors has the following distribution:Value of X01234Probability0.10.20.30.30.1(a) Check that this distribution satisfies the two requirements for a legitimate assignment of probabilities to individual outcomes.(b) Write the event "at least one nonword error" in term of X (for example, P(X >3)). What is the probability of this event?(c) Describe the event X ≤ 2 in words. What is its probability? 3. Discrete or continuous? For each exercise listed below, decide whether the random variable described is discrete or continuous and explains the sample space.(a) Choose a student in your class at random. Ask how much time that student spent studying during the past 24 hours.(b) In a test of a new package design, you drop a carton of a dozen eggs from a height of 1 foot and count the number of broken eggs.(c) A nutrition researcher feeds a new diet to a young male white rat. The response variable is the weight (in grams) that the rat gains in 8 weeks.4. Tossing Coins(a) The distribution of the count X of heads in a single coin toss will be as follows. Find the mean number of heads and the variance for a single coin toss.Number of Heads (Xi)01mean:Probability (Pi)0.50.5variance:(b) The distribution of the count X of heads in four tosses of a balanced coin was as follows but some missing probabilities. Fill in the blanks and then find the mean number of heads and the variance for the distribution with assumption that the tosses are independent of each other.Number of Heads (Xi)01234mean:Probability (Pi)0.06250.0625variance:(c) Show that the two results of the means (i.e. single toss and four tosses) are related by the addition rule for means. (d) Show that the two results of the variances (i.e. single toss and four tosses) are related by the addition rule for variances (note: It was assumed that the tosses are independent of each other). 5. Generating a sampling distribution. Let's illustrate the idea of a sampling distribution in the case of a very small sample from a very small .
Points: 250
Assignment 3:Biggest Challenges Facing Organizations in the Next 20 Years
Criteria
Unacceptable
Below 60% F
Meets Minimum Expectations
60-69% D
Fair
70-79% C
Proficient
80-89% B
Exemplary
90-100% A
1. Provide a title slide followed by a slide with an introduction to your presentation.
Weight: 5%
Did not submit or incompletely provided a title slide followed by a slide with an introduction to your presentation.
Insufficiently provided a title slide followed by a slide with an introduction to your presentation.
Partially provided a title slide followed by a slide with an introduction to your presentation.
Satisfactorily provided a title slide followed by a slide with an introduction to your presentation.
Thoroughly provided a title slide followed by a slide with an introduction to your presentation.
2. Presentation should include your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Only include one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides. Weight: 50%
Did not submit or incompletely included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Did not submit or incompletely included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Insufficiently included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Insufficiently included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Partially included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Partially included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Satisfactorily included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Satisfactorily included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Thoroughly included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Satisfactorily included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
3. Provide one (1) summary slide which addresses key points of your paper.
Weight: 5%
Did not submit or incompletely provided one (1) summary slide which addresses key points of your paper.
Insufficiently provided one (1) summary slide which addresses key points of your paper.
Partially provided one (1) summary slide which addresses key points of your paper.
Satisfactorily provided one (1) summary slide which addresses key points of your paper.
Thoroughly provided one (1) summary slide which addresses key points of your paper.
4. Narrate each slide,.
STATUse the information below to answer Questions 1 through 4..docxdessiechisomjj4
STAT
Use the information below to answer Questions 1 through 4.
Given a sample size of 36, with sample mean 670.3 and sample standard deviation 114.9, we perform the following hypothesis test.
Null Hypothesis
Alternative Hypothesis
1. What is the test statistic?
2. At a 10% significance level (90% confidence level), what is the critical value in this test? Do we reject the null hypothesis?
3. What are the border values between acceptance and rejection of this hypothesis?
4. What is the power of this test if the assumed true mean were 710 instead of 700?.
Questions 5 through 8 involve rolling of dice.
5. Given a fair, six-sided die, what is the probability of rolling the die twice and getting a “1” each time?
6. What is the probability of getting a “1” on the second roll when you get a “1” on the first roll?
7. The House managed to load the die in such a way that the faces “2” and “4” show up twice as frequently as all other faces. Meanwhile, all the other faces still show up with equal frequency. What is the probability of getting a “1” when rolling this loaded die?
8. Write the probability distribution for this loaded die, showing each outcome and its probability. Also plot a histogram to show the probability distribution.
Use the data in the table to answer Questions 9 through 11.
x
3
1
4
4
5
y
1
-2
3
5
9
9. Determine SSxx, SSxy, and SSyy.
10.
Find the equation of the regression line. What is the predicted value when
11. Is the correlation significant at 1% significance level (99% confidence level)? Why or why not?
Use the data below to answer Questions 12 through 14.
A group of students from three universities were asked to pick their favorite college sport to attend of their choice: The results, in number of students, are listed as follows:
Football
Basketball
Soccer
Maryland
60
70
20
Duke
10
75
15
UCLA
35
65
25
Supposed a student is randomly selected from the group mentioned above.
12. What is the probability that the student is from UCLA or chooses football?
13. What is the probability that the student is from Duke, given that the student chooses basketball?
14. What is the probability that the student is from Maryland and chooses soccer?
Use the information below to answer Questions 15 and 17.
There are 3600 apples in a shipment. The weight of the apples in this shipment is normally distributed. It is found that it a mean weight of 14 ounces with a standard deviation of 2.5 ounces.
15. How many of apples have weights between 13 ounces and 15 ounces?
16. What is the probability that a randomly selected mango weighs less than 12.5 ounces?
17. A quality inspector randomly selected 100 apples from the shipment.
a. What is the probability that the 100 randomly selected apples have a mean weight less than 12.5 ounces?
b. Do you come up with the same result in Question 16? Why or why not?
18. A pharmaceutical company has developed a screening test for a rare disease that afflicted 2% of the population. Un.
You must not work with another person on this exam Experience Tradition/tutor...pinck336896
FOR MORE CLASSES VISIT
www.tutorialoutlet.com
Show your work. You may use your book, notes, and other resources I have provided. You must not work with another person on this exam. If I have evidence that you worked or copied someone else’s work you may lose all points for that problem or potentially you will receive a zero on the exam; that goes for the other person as well. To avoid this potential problem, do not take this exam with someone else; do not talk about the problems in this exam with someone else. Instead, you can use problems from the homework as a conduit if needed. Do not compare answers with someone else. Write out values to four decimal places if the decimal representation does not terminate after four decimals. For situations you can write the values using fractions you can leave the answer in unreduced fraction form.
Summer (June) 2017
BIA2610
Exam 1
Multiple Choice, Questions 1-5. Place only one letter choice in the space provided. (5 points each)
_______ 1. The human resources department at a major high tech company recently conducted an employee satisfaction survey of 50 of its 2,000 employees. Data were collected on such variables as age, gender, current salary, level of overall satisfaction on a scale from 1 to 5, job title, and county of residence. Which of the variables would be considered categorical data?
a. age, gender, job satisfaction
b. job satisfaction, job title, gender, county of residence, age
c. county of residence, gender, job title, job satisfaction
d. all variables listed are qualitative
_______ 2. Which of the following does a histogram NOT show?
a. center and shape of data
b. relationship between two variables
c. relative frequency of data
d. spread of data
_______ 3. At the end of the school term, students are asked to rate the course and instructor by indicating on a scale of 1-5 how well they liked the course. The data generated from this question are examples of:
a. interval data
b. ordinal data
c. ratio data
d. nominal data
______ 4. When the production manager selects a sample of items that have been produced on her production line and computes the proportion of those items that are defective, the proportion is referred to as a:
a. parameter
b. population
c. mean
d. statistic
_______5. General Electric Corporation tracks employee turnover annually. They currently have a data set that contains turnover rate each year for the past 20 years. What type of data do they have?
a. time series data
b. cross-sectional data
c. nominal data
d. ordinal data
Open Answer, Questions 6-9. Answer each question as completely as possible. Partial credit will be given, so show all work. An answer without any work shown will be taken as a guess and will receive zero points. For example, if you use Excel, write down the function or formula you used. Indicate your final answer by circling it (25 points each).
6. Given the following observations from a sample, calculate the variance and standard deviation.
199
150
267
58
112
109
43
Variance
Standard deviation
7. A study in the Journal of the American Medical Association (February 20, 2008) found that patients who go into cardiac arrest while in the hospital are more likely to die if it happens after 11 pm. The study investigated 58,593 cardiac arrests that occurred during the day or evening. Of those, 11,604 survived to leave the hospital. There were 28,155 cardiac arrests during the shift that began at 11 pm, commonly referred to as the graveyard shift. Of those, 4,139 survived for discharge. The following contingency table summarizes the results of the study.
(round all answers to 3 decimal places)
a.
What is the probability that a randomly selected patient experienced cardiac arrest during the graveyard shift?
b.
Gi ...
TitleABC123 Version X1Time to Practice – Week Three .docxedwardmarivel
Title
ABC/123 Version X
1
Time to Practice – Week Three
PSYCH/625 Version 1
2
University of Phoenix Material
Time to Practice – Week Three
Complete both Part A and Part B below.
Part A
Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate Statistics. This data is available on the student website under the Student Test Resources link.
1. For the following research questions, create one null hypothesis, one directional research hypothesis, and one nondirectional research hypothesis.
a. What are the effects of attention on out-of-seat classroom behavior?
Research Hypothesis: There will be a relationship between the effects of attention on out-of-seat classroom behavior versus in-seat-classroom behavior.
b. What is the relationship between the quality of a marriage and the quality of the spouses’ relationships with their siblings?
Null Hypothesis: There will be no relationship in the relationship between the quality of a marriage and the quality of the spouses’ relationship with their siblings.
c. What is the best way to treat an eating disorder?
One Directional Research Hypothesis:
2. Provide one research hypothesis and an equation for each of the following topics:
a. The amount of money spent on food among undergraduate students and undergraduate student-athletes
b. The average amount of time taken by white and brown rats to get out of a maze
c. The effects of Drug A and Drug B on a disease
d. The time to complete a task in Method 1 and Method 2
3. Why does the null hypothesis presume no relationship between variables?
4. Create a research hypothesis tested using a one-tailed test and a research hypothesis tested using a two-tailed test.
5. What does the critical value represent?
6. Given the following information, would your decision be to reject or fail to reject the null hypothesis? Setting the level of significance at .05 for decision making, provide an explanation for your conclusion.
a. The null hypothesis that there is no relationship between the type of music a person listens to and his crime rate (p < .05).
In Hypothesis Testing, we typically deem a research hypothesis to be significant, if the odds of two means actually being equal are no greater than 1 in 20 or .05 (5%) or less.
b. The null hypothesis that there is no relationship between the amount of coffee consumption and GPA (p = .62).
c. The null hypothesis that there is a negative relationship between the number of hours worked and level of job satisfaction (p = .51).
7. Why is it harder to find a significant outcome (all other things being equal) when the research hypothesis is being tested at the .01 rather than the .05 level of significance?
At the .01 level, there is less room for error because the test is more rigorous.
8. Why should we think in terms of “failing to reject” the null rather than just accepting it?
9. When is it appropriate to use the one-sample z test?
10. What similarity does a z test have ...
1) Those methods involving the collection, presentation, and chara.docxdorishigh
1) Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called
A) statistical inference.
B) the scientific method.
C) sampling.
D) descriptive statistics.
Answer: D
2) Which of the following is NOT an element of descriptive statistical problems?
A) an inference made about the population based on the sample
B) the population or sample of interest
C) tables, graphs, or numerical summary tools
D) identification of patterns in the data
Answer: A
3) Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wanted to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester. Identify the population of interest to the researcher.
A) all Drummand University students
B) all college students
C) all first-year Drummand University students
D) the 250 students that were monitored
Answer: C
4) Researchers are concerned that the weight of the average American school child is increasing, implying, among other things, that children's clothing should be manufactured and marketed in larger sizes. If X is the weight of school children sampled in a nationwide study, then X is an example of
A) a categorical random variable.
B) a discrete random variable.
C) a continuous random variable.
D) a parameter.
Answer: C
5) The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week. Her assistant took a random sample of 250 students. The answer on "whether you visited campus bars on the weekend before the final exam week" from students in the sample is an example of
A) a categorical random variable.
B) a discrete random variable.
C) a continuous random variable.
D) a parameter.
Answer: A
6) The British Airways Internet site provides a questionnaire instrument that can be answered electronically. Which of the four methods of data collection is involved when people complete the questionnaire?
A) published sources
B) experimentation
C) surveying
D) observation
Answer: C
7) A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year?
A) 14%
B) 44%
C) 54%
D) 86%
Answer: D
8) One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data?
A) a Pareto chart
B) a two-way cl ...
ECO 480 Econometrics I Problem Set 5 Due Monday, Nove.docxjack60216
ECO 480 Econometrics I
Problem Set 5
Due: Monday, November 30, 2015 (beginning of the class)
1
Instruction: The problem sets are designed to be difficult and very time-intensive, so plan ahead. The
problem sets consists of solving theoretical problems and analyzing real data. You may discuss the
questions with your classmates, but you are required to hand in your own independently written solutions,
do-files, and log-files. No late work will be accepted and I do NOT accept any electronic copy. All the
data necessary for the problem set is available under UBlearns.
Important: It is extremely important to write a clean well-commented program for transparency and
replication purposes. In any empirical work, you should always be able to reproduce your result from raw
data to support your claim.
What to hand in: Typed write-up answering the assigned questions and interpreting your findings, do-file,
and log-file (you MUST use Stata). For questions involving data analysis, you will NOT get any credit if
you do not provide a program code. You may NOT use Excel.
1. How are returns on common stocks in overseas markets related to returns in U.S. markets? Consider
measuring U.S. returns by the annual rate of returns on the Standard & Poor’s (S&P) 500 stock index
and overseas returns by the annual rate of returns on the Morgan Stanley Europe, Australia, Asia, Far
East (EAFE) index. Both are recorded in percent. Regressing the EAFE returns on the S&P 500
returns for the 20 years 1989 to 2008. Here is part of the output for this regression:
The regression equation is EAFE = -2.58 + 0.775 S&P
Analysis of Variance
Source df SS MS
Model 4560.6
Residual
Total 19 8556.0
a. Complete the analysis of variance table by filling in the missing entries. Show (Justify) how you
came up with that answer.
b. What are the values of the regression standard error and the R2?
c. Find the standard error for the least-squares slope. Show your work.
d. If I tell you that the standard deviation of the S&P 500 returns for these years is 19.99%. How
would you use this information to find the standard error for the least-squares slope you found in
part c?
e. Give a 95% confidence interval for the slope β1 of the population regression line. Show your
work.
ECO 480 Econometrics I
Problem Set 5
Due: Monday, November 30, 2015 (beginning of the class)
2
2. An electronic survey of 7,061 players of Guitar Hero and Rock Band reported that 67% of those who
do not currently play a musical instrument said that they are likely to begin playing a real musical
instrument in the next two years. The reports describing the survey do not give the number of
respondents who do not currently play a musical instrument.
a. Explain why it is important to know the number of respondents who do not currently play a
musical instrument.
b. Assume that half of the respondents do not curre ...
In this unit, you will experience the powerful impact communication .docxwhitneyleman54422
In this unit, you will experience the powerful impact communication and miscommunication can have on cultural diversity.
Download the Communication: The Journey of Message Template
Follow the template instructions
Demonstrate your understanding of key concepts from the weekly content by including analysis of specific evidence in your responses within the template.
Use in-text citations and APA formatting for all source material references in your template.
Upload the completed template to this assessment.
.
In this task, you will write an analysis (suggested length of 3–5 .docxwhitneyleman54422
In this task, you will write an analysis (
suggested length of 3–5 pages
) of one work of literature. Choose
one
work from the list below:
Classical Period
• Sappho, “The Anactoria Poem” ca. 7th century B.C.E. (poetry)
• Aeschylus, “Song of the Furies” from
The Eumenides
, ca. 458 B.C.E. (poetry)
• Sophocles,
Antigone
, ca. 442 B.C.E. (drama)
• Aristotle, Book 1 from the
Nichomachean Ethics
, ca. 35 B.C.E. (philosophical text)
• Augustus,
The Deeds of the Divine Augustus
, ca. 14 C.E. (funerary inscription)
• Ovid, “The Transformation of Daphne into a Laurel” an excerpt from Book 1 of
The Metamorphoses
, ca. 2 C.E. (poetry)
Renaissance
• Francesco Petrarch, “The Ascent of Mount Ventoux” 1350 (letter)
• Giovanni Pico della Mirandola, the first seven paragraphs of the “Oration on the Dignity of Man” ca. 1486 (essay excerpt)
• Leonardo da Vinci, Chapter 28 “Comparison of the Arts” from
The Notebooks
ca. 1478-1518 (art text)
• Edmund Spenser, Sonnet 30, “My Love is like to Ice” from
Amoretti
1595 (poetry)
• William Shakespeare, Sonnet 18, “Shall I Compare Thee to a Summer’s Day” 1609 (poetry)
• Francis Bacon, “Of Studies” from
The Essays or Counsels…
1625 (essay)
• Anne Bradstreet, “In Honour of that High and Mighty Princess, Queen Elizabeth” 1643 (poetry)
• Andrew Marvell, “To his Coy Mistress” 1681 (poetry)
Enlightenment
• René Descartes, Part 4 from
Discourse on Method
, 1637 (philosophical text)
• William Congreve,
The Way of the World
, 1700 (drama-comedy)
• Jonathan Swift, “A Modest Proposal” 1729 (satirical essay)
• Voltaire, “Micromégas” 1752 (short story, science fiction)
• Phillis Wheatley, “To S.M., a Young African Painter, on Seeing his Works” 1773 (poetry)
• Thomas Paine, “Common Sense” 1776 (essay)
• Johann Wolfgang von Goethe, “The Fisherman” 1779 (poetry)
• Immanuel Kant, “An Answer to the Question: What is Enlightenment?” 1784 (essay)
Romanticism
• Lord Byron, “She Walks in Beauty” 1813 (poetry)
• Samuel Taylor Coleridge, “Kubla Khan” 1816 (poetry)
• Edgar Allan Poe, “The Fall of the House of Usher” 1839 (short story)
• Alexander Dumas,
The Count of Monte Cristo
, 1844 (novel)
• Emily Brontë,
Wuthering Heights
, 1847 (novel)
• Herman Melville, “Bartleby, the Scrivener: A Story of Wall-Street” 1853 (short story)
• Emily Dickinson, “A Narrow Fellow in the Grass” 1865 (poetry)
• Friedrich Nietzsche, Book 4 from
The Joyful Wisdom
, 1882 (philosophical text)
Realism
• Charles Dickens,
A Christmas Carol
, 1843 (novella)
• Karl Marx and Friedrich Engles,
The Communist Manifesto
, 1848 (political pamphlet)
• Christina Rossetti, “Goblin Market” 1862 (poetry)
• Matthew Arnold, “Dover Beach” 1867 (poetry)
• Robert Louis Stevenson,
The Strange Case of Dr. Jekyll and Mr. Hyde
, 1886 (novella)
• Kate Chopin, “The Story of an Hour” 1894 (short story)
• Mark Twain, “The.
More Related Content
Similar to STAT 200 Introduction to Statistics Final Examination, Sp.docx
STAT 200 Final ExaminationFall 2016 OL1US1Page 9 of 9STAT 200.docxwhitneyleman54422
STAT 200 Final ExaminationFall 2016 OL1/US1Page 9 of 9
STAT 200 Introduction to Statistics Name______________________________
Final Examination: Fall 2016 OL1/US1 Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with others is allowed. It is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. Your exam will receive a zero grade unless you complete the following honor statement.
Please sign (or type) your name below the following honor statement:
I understand that it is a violation of the UMUC Academic Dishonesty and Plagiarism policy to use unauthorized materials or work from others. I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name _____________________Date___________________
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
(c)
(d)
(e)
Justification:
2
Answer:
(a)
(b)
(c)
Justification:
3
Answer:
(a)
(b)
Justification:
4
Answer:
(a)
IQ Scores
Frequency
Relative Frequency
50 - 69
23
70 - 89
249
90 -109
0.450
110 - 129
130 - 149
25
Total
1000
(b)
(c)
Work for (a) and (b):
5
Answer:
(a)
(b)
(c)
Justification:
6
Answer:
(a)
(b)
Work for (a) and (b):
7
Answer:
(a)
(b)
Work for (b):
8
Answer:
(.
Answer all 20 questions. Make sure your answers are as complet.docxfestockton
Answer all 20 questions. Make sure your answers are as complete as possible, particularly when it asks for you to show
your work. Answers that come straight from calculators, programs or software packages without any explanation will
not be accepted. If you need to use technology (for example, Excel, online or hand-held calculators, statistical packages)
to aid in your calculation, you must cite the sources and explain how you get the results. For example, state the Excel
function along with the required parameters when using Excel; describe the detailed steps when using a hand-held
calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Record your answers and work on the separate answer sheet provided.
This exam has 20 problems; 5% for each problems.
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1. You wish to estimate the mean cholesterol levels of patients two days after they had a heart attack. To estimate the
mean, you collect data from 28 heart patients. Justify for full credit.
(a) Which of the followings is the sample?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
(b) Which of the followings is the variable?
(i) Mean cholesterol levels of 28 patients recovering from a heart attack suffered two days ago
(ii) Cholesterol level of the person recovering from heart attack suffered two days ago
(iii) Set of all patients recovering from a heart attack suffered two days ago
(iv) Set of 28 patients recovering from a heart attack suffered two days ago
2. Choose the best answer. Justify for full credit.
(a) The Knot.com surveyed nearly 13,000 couples, who married in 2017, and asked how much they spent on their
wedding. The average amount of money spent on was $33,391. The value $33,391 is a:
(i) parameter
(ii) statistic
(iii) cannot be determined from information provided.
(b) A marketing agent asked people to rank the quality of a new soap on a scale from 1 (poor) to 5 (excellent). The level
of this measurement is
(i) nominal
(ii) ordinal
(iii) interval
(iv) ratio
3. True or False. Justify for full credit.
(a) If the variance from a data set is zero, then all the observations in this data set must be identical.
(b) The median of a normal distribution curve is always zero.
4. A STAT 200 student is interested in the number of credit cards owned by college students. She surveyed all of her
classmates to collect sample data.
(a) What type of sampling method is being used?
(b) Please explain your answer.
5. A study was conducted to determine whether the mean braking distance of four-cylinder cars is greater than th ...
Answer SheetInstructions This is an open-book exam. Yo.docxfestockton
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
Justification for (a) and (b):
2
Answer:
(a)
(b)
Justification for (a) and (b):
3
Answer:
(a)
(b)
Justification for (a) and (b):
4
Answer:
(a)
(b)
5
Answer:
(a)
(b)
6
Answer:
(a)
(b)
7
Answer:
(a)
(b)
(c)
Work for (a) and (b):
8
Answer:
(a)
(b)
9
Answer:
(a)
(b)
10
Answer:
(a)
(b)
11
Answer:
(a)
(b)
12
Answer:
(a) n = , p = , and q = .
(b)
(c)
13
Answer:
(a)
(b)
14
Answer:
(a)
(b)
15
Answer:
(a)
(b)
16
Answer:
(a)
(b)
17
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
18
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
19
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
20
Answers:
(a)
(b)
(c)
(d)
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1
STAT 200
OL1 Sections
Final Exam
Fall 2019
The final exam will be posted at 12:01 am on October 11, 2019, and
it is due at 11:59 pm on October 13, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized ma ...
STAT 225 Final ExaminationSummer 2015 OL1US1Page 1 of 10STAT .docxdessiechisomjj4
STAT 225 Final ExaminationSummer 2015 OL1/US1Page 1 of 10
STAT 225 Introduction to Statistical Methods for the Behavioral Science
Final Examination: Summer 2015 OL1 / US1Name______________________________
Instructor __________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 25 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from programs or software packages will not be accepted. If you need to use software (for example, Excel) and /or online or hand-held calculators to aid in your calculation, please cite the source and explain how you get the results.
When requested, show all work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
You must complete the exam individually. Neither collaboration nor consultation with others is allowed. Your exam will receive a zero grade unless you complete the following honor statement.
Please sign (or type) your name below the following honor statement:
I promise that I did not discuss any aspect of this exam with anyone other than my instructor. I further promise that I neither gave nor received any unauthorized assistance on this exam, and that the work presented herein is entirely my own.
Name _____________________Date___________________
Record your answers and work.
Problem Number
Solution
1
(25 pts)
Answers:
(a)
(b)
(c)
(d)
(e)
Work for (a), (b), (c), (d) and (e):
2
(5 pts)
Answer:
Study Time (in hours)
Frequency
Relative Frequency
0.0 – 4.9
5
5.0 - 9.9
13
10.0 - 14.9
0.22
15.0 -19.9
42
20.0 – 24.9
Total
100
Work:
3
(5 pts)
Answer:
Work:
4
(5 pts)
Answer:
Work:
5
(5 pts)
Answer:
Work:
6
(5 pts)
Answer:
Work:
7
(10 pts)
Answer:
Work:
8
(5 pts)
Answer:
Work:
9
(5 pts)
Answer:
Work:
10
(5 pts)
Answer:
Work:
11
(5 pts)
Answer:
Work:
12
(10 pts)
Answer:
Work:
13
(10 pts)
Answer:
Work:
14
(5 pts)
Answer:
Work:
15
(15 pts)
Answer:
(a)
x
P(x)
0
1
2
3
(b) mean = __________ , and standard deviation = _____________
Work for (a) and (b):
16
(20 pts)
Answer:
(a)
(b)
(c)
Work for (a), (b) and (c) :
17
(10 pts)
Answer:
Work:
18
(5 pts)
Answer:
Work:
19
(5 pts)
Answer:
Work:
20
(10 pts)
Answer:
Work:
21
(15 pt.
STAT 200 Final ExaminationFall 2019 OL1Page 1 of 11Answer .docxsusanschei
STAT 200 Final Examination
Fall 2019 OL1
Page 1 of 11
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and other course materials as you work on the exam, and you may use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as complete as possible. Show all of your work and reasoning. In particular, when there are calculations involved, you must show how you come up with your answers with critical work and/or necessary tables. Answers that come straight from calculators, programs or software packages without explanation will not be accepted. If you need to use technology to aid in your calculation, you have to cite the source and explain how you get the results. For example, state the Excel function along with the required parameters when using Excel; describe the detailed steps when using a hand-held calculator; or provide the URL and detailed steps when using an online calculator, and so on.
Show all supporting work and write all answers in the spaces allotted on the following pages. You may type your work using plain-text formatting or an equation editor, or you may hand-write your work and scan it. In either case, show work neatly and correctly, following standard mathematical conventions. Each step should follow clearly and completely from the previous step. If necessary, you may attach extra pages.
Record your answers and work.
Problem Number
Solution
1
Answer:
(a)
(b)
Justification for (a) and (b):
2
Answer:
(a)
(b)
Justification for (a) and (b):
3
Answer:
(a)
(b)
Justification for (a) and (b):
4
Answer:
(a)
(b)
5
Answer:
(a)
(b)
6
Answer:
(a)
(b)
7
Answer:
(a)
(b)
(c)
Work for (a) and (b):
8
Answer:
(a)
(b)
9
Answer:
(a)
(b)
10
Answer:
(a)
(b)
11
Answer:
(a)
(b)
12
Answer:
(a) n = , p = , and q = .
(b)
(c)
13
Answer:
(a)
(b)
14
Answer:
(a)
(b)
15
Answer:
(a)
(b)
16
Answer:
(a)
(b)
17
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
18
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
(g)
19
Answer:
(a)
(b)
(c)
(d)
(e)
(f)
20
Answers:
(a)
(b)
(c)
(d)
STAT 200: Introduction to Statistics
Final Examination, Fall 2019 OL1
1
STAT 200
OL1 Sections
Final Exam
Fall 2019
The final exam will be posted at 12:01 am on October 11, 2019, and
it is due at 11:59 pm on October 13, 2019 Eastern Time.
This is an open-book exam. You may refer to your text and other course materials
for the current course as you work on the exam, and you may use a calculator,
applets, or Excel. You must complete the exam individually. Neither collaboration
nor consultation with others is allowed. It is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized materials or work from
others.
Answer all 20 questions. Mak.
Stat 230 Summer 2014 – Final Exam Page 1 .docxdessiechisomjj4
Stat 230 Summer 2014 – Final Exam
Page 1
Please answer all 30 questions. Make sure your answers are as complete as
possible. Show all of your work and reasoning. In particular, when there are
calculations involved, you must show how you come up with your answers
with critical work and/or necessary tables. Answers that come straight from
program software packages will not be accepted.
You must include the Honor Pledge on the title page of your
submitted final exam. Exam submitted without the Honor
Pledge will not be accepted.
Honor Pledge: "I have completed this final examination myself, working independently
and not consulting anyone except the instructor. I have neither given nor received help on this
final examination."
Use the information below to answer Questions 1 through 3.
Given a sample size of 34, with sample mean 660.3 and sample standard deviation 104.9, we
perform the following hypothesis test. Since n>30, this is a Z test.
Null Hypothesis 0 : 700H
Alternative Hypothesis : 700aH
1. What is the test statistic? What is the p-value?
2. At a 5% significance level (95% confidence level), what is the critical value(s) in this
test? Do we reject the null hypothesis?
3. What are the border values of x between acceptance and rejection of this hypothesis?
Stat 230 Summer 2014 – Final Exam
Page 2
Questions 4 through 7 involve rolling of dice.
4. Given a fair, six-sided die, what is the probability of rolling the die twice and getting a
“1” each time?
5. What is the probability of getting a “1” on the second roll when you get a “1” on the first
roll?
6. The House managed to load the die in such a way that the faces “2” and “4” show up
twice as frequently as all other faces. Meanwhile, all the other faces still show up with
equal frequency. What is the probability of getting a “5” when rolling this loaded die?
7. Write the probability distribution for this loaded die, showing each outcome and its
probability.
Use the data in the table to answer Questions 8 through 9.
x 3 1 4 4 5
y 2 -2 5 4 8
8. Determine SSxx, SSxy, and SSyy.
9. Find the equation of the regression line. What is the predicted value when 4?x
Stat 230 Summer 2014 – Final Exam
Page 3
Use the data below to answer Questions 10 through 12.
A group of students from three universities were asked to pick their favorite college sport
to attend of their choice: The results, in number of students, are listed as follows:
Football Basketball Soccer
Maryland 60 70 20
Duke 10 75 15
UCLA 35 65 25
Supposed that a student is randomly selected from the group mentioned above.
10. What is the probability that the student is from UCLA or chooses football?
11. What is the probability that the student is from Duke, given that the student chooses
basketball?
12. What is the probability that the .
1. True or False. Justify for full credit.(10 pts)(a) The .docxjackiewalcutt
1. True or False. Justify for full credit.
(10 pts)
(a) The normal distribution curve is always symmetric to its mean.
(b) If the variance from a data set is zero, then all the observations in this data set are identical.
(c)
P(A AND Ac )
1, where Ac is the complement of A.
(d) In a hypothesis testing, if the p-value is less than the significance level α, we do not have sufficient evidence to reject the null hypothesis.
(e) The volume of milk in a jug of milk is 128 oz. The value 128 is from a discrete data set.
Refer to the following frequency distribution for Questions 2, 3, 4, and 5. Show all work. Just the answer, without supporting work, will receive no credit.A random sample of 25 customers was chosen in UMUC MiniMart between 3:00 and 4:00 PM on a Friday afternoon. The frequency distribution below shows the distribution for checkout time (in minutes).
Checkout Time (in minutes)
Frequency
Relative Frequency
1.0 - 1.9
2
2.0 - 2.9
8
3.0 - 3.9
4.0 - 5.9
5
Total
25
2. Complete the frequency table with frequency and relative frequency.
(1 pt)
3. What percentage of the checkout times was less than 3 minutes?
(1pt)
4. In what class interval must the median lie? Explain your answer.
(1 pt)
5. Assume that the largest observation in this dataset is 5.8. Suppose this observation were incorrectly recorded as 8.5 instead of 5.8. Will the mean increase, decrease, or remain the same? Will the median increase, decrease or remain the same? Why?
(1 pt)
6. A random sample of STAT200 weekly study times in hours is as follows: 2 15 15 18 30
Find the sample standard deviation. (Round the answer to two decimal places. Show all work. Just the answer, without supporting work, will receive no credit.)
(1 pt)
Refer to the following information for Questions 7, 8, and 9. Show all work. Just the answer, without supporting work, will receive no credit.A fair coin is tossed 4 times.
7. How many outcomes are there in the sample space?
(5 pts)
8. What is the probability that the third toss is heads, given that the first toss is heads? (5 pts)
9. Let A be the event that the first toss is heads, and B be the event that the third toss is heads. Are A
and B independent? Why or why not?
(5 pts)
Refer to the following situation for Questions 10, 11, and 12.
The boxplots below show the real estate values of single family homes in two neighboring cities, in thousands of dollars.
For each question, give your answer as one of the following: (a) Tinytown; (b) BigBurg; (c) Both cities have the same value requested; (d) It is impossible to tell using only the given information. Then explain your answer in each case.
(5 pts each)
10. Which city has greater variability in real estate values?
11. Which city has the greater percentage of households with values $85,000 and over?
12. Which city has a greater percentage of homes with real estate values between $55,000 and $85,000?
Refer to the following information for Questions 13 and 14. Show all work. Just ...
Question 1 In your own words, write a minimum of three sen.docxIRESH3
Question 1
In your own words, write a minimum of three sentences describing the Ashcan school.
Question 2
The new modern artists, such as the Ashcan artist, rejected which American era:
A.
The Age of Enlightenment
B.
The Neoclassical Age
C.
The Gilded Age
D.
The Impressionist Age
Question 3
Robert Henri was a progressive artist. He studied at the Ecole de Beaux Arts in Paris, was influenced by the Impressionists, and even helped organize the Armory Show. However, he was opposed to American artists creating art that too closely followed European styles. What were his opinions when contemplating the idea of a National American Art?
Question 4
Read the text on Marsden Hartley on page 66 of our text. Review his image Portrait of a German Officer and give a two paragraph reaction essay.
Question 5
According to our text, Blank 1 was the first (short lived) non-objective, non-representational modern American art movement.
Question 6
Alfred Stieglitz ran an American gallery from 1908-1917 called Blank 1 . He dedicated this exhibition space to showing avant-garde artists such as John Marin and Arthur Dove.
Question 7
Write a formal analysis of the painting by George Bellows entitled Both Members of this Club, 1909. Start by listing the title, artist, and date of the artwork. Next, imagine that you are writing a letter to a friend who has never seen the painting. Describe the painting in detail. Be sure to analyze the lines, colors, textures, space, and shapes you see in the painting. Finally, write an interpretation of the painting--in other words, explain what the painting says or communicates to you. What function, purpose or idea does the painting represent? You can see an example of this method of analysis at Goya Analysis at http://www.artmuseums.com/goya.htm.
Art analysis question should be no less than 2 or 3 well developed paragraphs.
Question 8
Who was not in the Stieglitz circle of artists?
A.
Arthur Dove
B.
Marsden Hartley
C.
Joseph Stella
D.
Georgia O’Keeffe
Question 9
What was “Fountain” by Marcel Duchamp (R. Mutt)?
Question 10
The artist Blank 1 made paintings that were rejected from the National Academy exhibition. He went on to teach artists to paint with intensity and emotion, and capture the ‘spirit’ of the people and cities of their urban world?
Question 11
According to our text, what was the key difference between Henri and Stieglitz?
Question 12
Which group held an exhibit at the Macbeth Gallery that set America on a course of Modern Art?
STAT 200: Introduction to Statistics Final Examination, Fall 2015 OL1/US1 Page 1 of 6
STAT 200
OL1/US1 Sections
Final Exam
Fall 2015
The final exam will be posted at 12:01 am on October 9, and it
is due at 11:59 pm on October 11, 2015. Eastern Time is our
reference time.
This is an open-book exam. You may refer to your text and other course
materials as you work on the exam, and you may use a calculator. You ...
Part 1 Please circle the correct answer.1. Which of t.docxherbertwilson5999
Part 1: Please circle the correct answer.
1. Which of the following is most sensitive to outliers?
a. interquartile range b.standard deviation. c. median
d. mode
2. James and George took a math exam. George’s percentile score on the exam was 80; James’s
percentile score was 40 on the same test. We know that
a) George correctly answered twice as many questions than James. b) They both scored better than 40 of their classmates.
c) George correctly answered more questions than James. d) James did not pass the test.
3. Find the mean and standard deviation for a binomial experiment where n 260,
p 0.675 .
a) 260 , b) 260 ,
7.55
57.04
c) 175.50 ,
7.55
d) 97.50 ,
e) 175.50 ,
13.25
9.19
4. If we were to create a box plot, which of the following statement(s) would be true?
A. The median would be located somewhere within the box.
B. The median value would be larger than the third quartile value (Q3) C. The median would always be centered in the middle of the box.
D. The median would indicate where the 50th percentile would be.
a) A and B
b) All of them. c) A and D
d) C and D.
e) None of them.
5. Which of these statements are false?
a. There is a strong linear relationship between gender and height because we found a correlation of .55.
b. Plant height and leaf height were found to be negatively correlated because the correlation coefficient is -1.41.
c. Since the correlation between X and Y is 0, this means there is no relationship whatsoever between these two variables.
d. All of the above.
e. None of the above.
6. Some methods may be used to make a confidence interval wider or narrower. Circle the two
methods that would decrease the width of a confidence interval for a mean, if all else stays the same.
a. Increase the sample size. b. decrease the sample size.
c. increase the level of confidence. d. decrease the level of confidence.
7. Two researchers are going to take a sample of data from the same population of physics students. Researcher A will select a random sample of students from among all students taking physics. Researcher B's sample will consist only of the students in her class. Both researchers will construct a 95% confidence interval for the mean score on the physics final exam using their own sample data. Which researcher's method has a 95% chance of capturing the true mean of the population of all students taking physics?
a. Both methods have a 95% chance of capturing the true mean b. Researcher A
c. Research B
d. Neither
8. A 98% confidence interval indicates that:
a. 98% of the intervals constructed using this process based on samples from this population will include the population mean
b. 98% of the time the interval will include the sample mean
c. 98% of the possible population means will be included by the interval
9. A one-tailed hypothesis test is performed using a 0.10 level of significance. .
InstructionDue Date 6 pm on October 28 (Wed)Part IProbability a.docxdirkrplav
InstructionDue Date: 6 pm on October 28 (Wed)
Part IProbability and Sampling Distributions1.Thinking about probability statements. Probability is measure of how likely an event is to occur. Match one of probabilities that follow with each statement of likelihood given (The probability is usually a more exact measure of likelihood than is the verbal statement.)Answer0 0.01 0.3 0.6 0.99 1(a) This event is impossible. It can never occur.(b) This event is certain. It will occur on every trial.(c) This event is very unlikely, but it will occur once in a while in a long sequence of trials.(d) This event will occur more often that not.2. Spill or Spell? Spell-checking software catches "nonword errors" that result in a string of letters that is not a word, as when "the" is typed as "the." When undergraduates are asked to write a 250-word essay (without spell-checking), the number X of nonword errors has the following distribution:Value of X01234Probability0.10.20.30.30.1(a) Check that this distribution satisfies the two requirements for a legitimate assignment of probabilities to individual outcomes.(b) Write the event "at least one nonword error" in term of X (for example, P(X >3)). What is the probability of this event?(c) Describe the event X ≤ 2 in words. What is its probability? 3. Discrete or continuous? For each exercise listed below, decide whether the random variable described is discrete or continuous and explains the sample space.(a) Choose a student in your class at random. Ask how much time that student spent studying during the past 24 hours.(b) In a test of a new package design, you drop a carton of a dozen eggs from a height of 1 foot and count the number of broken eggs.(c) A nutrition researcher feeds a new diet to a young male white rat. The response variable is the weight (in grams) that the rat gains in 8 weeks.4. Tossing Coins(a) The distribution of the count X of heads in a single coin toss will be as follows. Find the mean number of heads and the variance for a single coin toss.Number of Heads (Xi)01mean:Probability (Pi)0.50.5variance:(b) The distribution of the count X of heads in four tosses of a balanced coin was as follows but some missing probabilities. Fill in the blanks and then find the mean number of heads and the variance for the distribution with assumption that the tosses are independent of each other.Number of Heads (Xi)01234mean:Probability (Pi)0.06250.0625variance:(c) Show that the two results of the means (i.e. single toss and four tosses) are related by the addition rule for means. (d) Show that the two results of the variances (i.e. single toss and four tosses) are related by the addition rule for variances (note: It was assumed that the tosses are independent of each other). 5. Generating a sampling distribution. Let's illustrate the idea of a sampling distribution in the case of a very small sample from a very small .
Points: 250
Assignment 3:Biggest Challenges Facing Organizations in the Next 20 Years
Criteria
Unacceptable
Below 60% F
Meets Minimum Expectations
60-69% D
Fair
70-79% C
Proficient
80-89% B
Exemplary
90-100% A
1. Provide a title slide followed by a slide with an introduction to your presentation.
Weight: 5%
Did not submit or incompletely provided a title slide followed by a slide with an introduction to your presentation.
Insufficiently provided a title slide followed by a slide with an introduction to your presentation.
Partially provided a title slide followed by a slide with an introduction to your presentation.
Satisfactorily provided a title slide followed by a slide with an introduction to your presentation.
Thoroughly provided a title slide followed by a slide with an introduction to your presentation.
2. Presentation should include your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Only include one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides. Weight: 50%
Did not submit or incompletely included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Did not submit or incompletely included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Insufficiently included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Insufficiently included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Partially included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Partially included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Satisfactorily included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Satisfactorily included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
Thoroughly included your choice of the five (5) challenges you believe organizations will face in the next twenty (20) years. Satisfactorily included one (1) challenge and your explanation for choosing that challenge per slide for a total of five (5) slides.
3. Provide one (1) summary slide which addresses key points of your paper.
Weight: 5%
Did not submit or incompletely provided one (1) summary slide which addresses key points of your paper.
Insufficiently provided one (1) summary slide which addresses key points of your paper.
Partially provided one (1) summary slide which addresses key points of your paper.
Satisfactorily provided one (1) summary slide which addresses key points of your paper.
Thoroughly provided one (1) summary slide which addresses key points of your paper.
4. Narrate each slide,.
STATUse the information below to answer Questions 1 through 4..docxdessiechisomjj4
STAT
Use the information below to answer Questions 1 through 4.
Given a sample size of 36, with sample mean 670.3 and sample standard deviation 114.9, we perform the following hypothesis test.
Null Hypothesis
Alternative Hypothesis
1. What is the test statistic?
2. At a 10% significance level (90% confidence level), what is the critical value in this test? Do we reject the null hypothesis?
3. What are the border values between acceptance and rejection of this hypothesis?
4. What is the power of this test if the assumed true mean were 710 instead of 700?.
Questions 5 through 8 involve rolling of dice.
5. Given a fair, six-sided die, what is the probability of rolling the die twice and getting a “1” each time?
6. What is the probability of getting a “1” on the second roll when you get a “1” on the first roll?
7. The House managed to load the die in such a way that the faces “2” and “4” show up twice as frequently as all other faces. Meanwhile, all the other faces still show up with equal frequency. What is the probability of getting a “1” when rolling this loaded die?
8. Write the probability distribution for this loaded die, showing each outcome and its probability. Also plot a histogram to show the probability distribution.
Use the data in the table to answer Questions 9 through 11.
x
3
1
4
4
5
y
1
-2
3
5
9
9. Determine SSxx, SSxy, and SSyy.
10.
Find the equation of the regression line. What is the predicted value when
11. Is the correlation significant at 1% significance level (99% confidence level)? Why or why not?
Use the data below to answer Questions 12 through 14.
A group of students from three universities were asked to pick their favorite college sport to attend of their choice: The results, in number of students, are listed as follows:
Football
Basketball
Soccer
Maryland
60
70
20
Duke
10
75
15
UCLA
35
65
25
Supposed a student is randomly selected from the group mentioned above.
12. What is the probability that the student is from UCLA or chooses football?
13. What is the probability that the student is from Duke, given that the student chooses basketball?
14. What is the probability that the student is from Maryland and chooses soccer?
Use the information below to answer Questions 15 and 17.
There are 3600 apples in a shipment. The weight of the apples in this shipment is normally distributed. It is found that it a mean weight of 14 ounces with a standard deviation of 2.5 ounces.
15. How many of apples have weights between 13 ounces and 15 ounces?
16. What is the probability that a randomly selected mango weighs less than 12.5 ounces?
17. A quality inspector randomly selected 100 apples from the shipment.
a. What is the probability that the 100 randomly selected apples have a mean weight less than 12.5 ounces?
b. Do you come up with the same result in Question 16? Why or why not?
18. A pharmaceutical company has developed a screening test for a rare disease that afflicted 2% of the population. Un.
You must not work with another person on this exam Experience Tradition/tutor...pinck336896
FOR MORE CLASSES VISIT
www.tutorialoutlet.com
Show your work. You may use your book, notes, and other resources I have provided. You must not work with another person on this exam. If I have evidence that you worked or copied someone else’s work you may lose all points for that problem or potentially you will receive a zero on the exam; that goes for the other person as well. To avoid this potential problem, do not take this exam with someone else; do not talk about the problems in this exam with someone else. Instead, you can use problems from the homework as a conduit if needed. Do not compare answers with someone else. Write out values to four decimal places if the decimal representation does not terminate after four decimals. For situations you can write the values using fractions you can leave the answer in unreduced fraction form.
Summer (June) 2017
BIA2610
Exam 1
Multiple Choice, Questions 1-5. Place only one letter choice in the space provided. (5 points each)
_______ 1. The human resources department at a major high tech company recently conducted an employee satisfaction survey of 50 of its 2,000 employees. Data were collected on such variables as age, gender, current salary, level of overall satisfaction on a scale from 1 to 5, job title, and county of residence. Which of the variables would be considered categorical data?
a. age, gender, job satisfaction
b. job satisfaction, job title, gender, county of residence, age
c. county of residence, gender, job title, job satisfaction
d. all variables listed are qualitative
_______ 2. Which of the following does a histogram NOT show?
a. center and shape of data
b. relationship between two variables
c. relative frequency of data
d. spread of data
_______ 3. At the end of the school term, students are asked to rate the course and instructor by indicating on a scale of 1-5 how well they liked the course. The data generated from this question are examples of:
a. interval data
b. ordinal data
c. ratio data
d. nominal data
______ 4. When the production manager selects a sample of items that have been produced on her production line and computes the proportion of those items that are defective, the proportion is referred to as a:
a. parameter
b. population
c. mean
d. statistic
_______5. General Electric Corporation tracks employee turnover annually. They currently have a data set that contains turnover rate each year for the past 20 years. What type of data do they have?
a. time series data
b. cross-sectional data
c. nominal data
d. ordinal data
Open Answer, Questions 6-9. Answer each question as completely as possible. Partial credit will be given, so show all work. An answer without any work shown will be taken as a guess and will receive zero points. For example, if you use Excel, write down the function or formula you used. Indicate your final answer by circling it (25 points each).
6. Given the following observations from a sample, calculate the variance and standard deviation.
199
150
267
58
112
109
43
Variance
Standard deviation
7. A study in the Journal of the American Medical Association (February 20, 2008) found that patients who go into cardiac arrest while in the hospital are more likely to die if it happens after 11 pm. The study investigated 58,593 cardiac arrests that occurred during the day or evening. Of those, 11,604 survived to leave the hospital. There were 28,155 cardiac arrests during the shift that began at 11 pm, commonly referred to as the graveyard shift. Of those, 4,139 survived for discharge. The following contingency table summarizes the results of the study.
(round all answers to 3 decimal places)
a.
What is the probability that a randomly selected patient experienced cardiac arrest during the graveyard shift?
b.
Gi ...
TitleABC123 Version X1Time to Practice – Week Three .docxedwardmarivel
Title
ABC/123 Version X
1
Time to Practice – Week Three
PSYCH/625 Version 1
2
University of Phoenix Material
Time to Practice – Week Three
Complete both Part A and Part B below.
Part A
Some questions in Part A require that you access data from Statistics for People Who (Think They) Hate Statistics. This data is available on the student website under the Student Test Resources link.
1. For the following research questions, create one null hypothesis, one directional research hypothesis, and one nondirectional research hypothesis.
a. What are the effects of attention on out-of-seat classroom behavior?
Research Hypothesis: There will be a relationship between the effects of attention on out-of-seat classroom behavior versus in-seat-classroom behavior.
b. What is the relationship between the quality of a marriage and the quality of the spouses’ relationships with their siblings?
Null Hypothesis: There will be no relationship in the relationship between the quality of a marriage and the quality of the spouses’ relationship with their siblings.
c. What is the best way to treat an eating disorder?
One Directional Research Hypothesis:
2. Provide one research hypothesis and an equation for each of the following topics:
a. The amount of money spent on food among undergraduate students and undergraduate student-athletes
b. The average amount of time taken by white and brown rats to get out of a maze
c. The effects of Drug A and Drug B on a disease
d. The time to complete a task in Method 1 and Method 2
3. Why does the null hypothesis presume no relationship between variables?
4. Create a research hypothesis tested using a one-tailed test and a research hypothesis tested using a two-tailed test.
5. What does the critical value represent?
6. Given the following information, would your decision be to reject or fail to reject the null hypothesis? Setting the level of significance at .05 for decision making, provide an explanation for your conclusion.
a. The null hypothesis that there is no relationship between the type of music a person listens to and his crime rate (p < .05).
In Hypothesis Testing, we typically deem a research hypothesis to be significant, if the odds of two means actually being equal are no greater than 1 in 20 or .05 (5%) or less.
b. The null hypothesis that there is no relationship between the amount of coffee consumption and GPA (p = .62).
c. The null hypothesis that there is a negative relationship between the number of hours worked and level of job satisfaction (p = .51).
7. Why is it harder to find a significant outcome (all other things being equal) when the research hypothesis is being tested at the .01 rather than the .05 level of significance?
At the .01 level, there is less room for error because the test is more rigorous.
8. Why should we think in terms of “failing to reject” the null rather than just accepting it?
9. When is it appropriate to use the one-sample z test?
10. What similarity does a z test have ...
1) Those methods involving the collection, presentation, and chara.docxdorishigh
1) Those methods involving the collection, presentation, and characterization of a set of data in order to properly describe the various features of that set of data are called
A) statistical inference.
B) the scientific method.
C) sampling.
D) descriptive statistics.
Answer: D
2) Which of the following is NOT an element of descriptive statistical problems?
A) an inference made about the population based on the sample
B) the population or sample of interest
C) tables, graphs, or numerical summary tools
D) identification of patterns in the data
Answer: A
3) Most analysts focus on the cost of tuition as the way to measure the cost of a college education. But incidentals, such as textbook costs, are rarely considered. A researcher at Drummand University wanted to estimate the textbook costs of first-year students at Drummand. To do so, she monitored the textbook cost of 250 first-year students and found that their average textbook cost was $600 per semester. Identify the population of interest to the researcher.
A) all Drummand University students
B) all college students
C) all first-year Drummand University students
D) the 250 students that were monitored
Answer: C
4) Researchers are concerned that the weight of the average American school child is increasing, implying, among other things, that children's clothing should be manufactured and marketed in larger sizes. If X is the weight of school children sampled in a nationwide study, then X is an example of
A) a categorical random variable.
B) a discrete random variable.
C) a continuous random variable.
D) a parameter.
Answer: C
5) The chancellor of a major university was concerned about alcohol abuse on her campus and wanted to find out the proportion of students at her university who visited campus bars on the weekend before the final exam week. Her assistant took a random sample of 250 students. The answer on "whether you visited campus bars on the weekend before the final exam week" from students in the sample is an example of
A) a categorical random variable.
B) a discrete random variable.
C) a continuous random variable.
D) a parameter.
Answer: A
6) The British Airways Internet site provides a questionnaire instrument that can be answered electronically. Which of the four methods of data collection is involved when people complete the questionnaire?
A) published sources
B) experimentation
C) surveying
D) observation
Answer: C
7) A professor of economics at a small Texas university wanted to determine what year in school students were taking his tough economics course. Shown below is a pie chart of the results. What percentage of the class took the course prior to reaching their senior year?
A) 14%
B) 44%
C) 54%
D) 86%
Answer: D
8) One of the developing countries is experiencing a baby boom, with the number of births rising for the fifth year in a row, according to a BBC News report. Which of the following is best for displaying this data?
A) a Pareto chart
B) a two-way cl ...
ECO 480 Econometrics I Problem Set 5 Due Monday, Nove.docxjack60216
ECO 480 Econometrics I
Problem Set 5
Due: Monday, November 30, 2015 (beginning of the class)
1
Instruction: The problem sets are designed to be difficult and very time-intensive, so plan ahead. The
problem sets consists of solving theoretical problems and analyzing real data. You may discuss the
questions with your classmates, but you are required to hand in your own independently written solutions,
do-files, and log-files. No late work will be accepted and I do NOT accept any electronic copy. All the
data necessary for the problem set is available under UBlearns.
Important: It is extremely important to write a clean well-commented program for transparency and
replication purposes. In any empirical work, you should always be able to reproduce your result from raw
data to support your claim.
What to hand in: Typed write-up answering the assigned questions and interpreting your findings, do-file,
and log-file (you MUST use Stata). For questions involving data analysis, you will NOT get any credit if
you do not provide a program code. You may NOT use Excel.
1. How are returns on common stocks in overseas markets related to returns in U.S. markets? Consider
measuring U.S. returns by the annual rate of returns on the Standard & Poor’s (S&P) 500 stock index
and overseas returns by the annual rate of returns on the Morgan Stanley Europe, Australia, Asia, Far
East (EAFE) index. Both are recorded in percent. Regressing the EAFE returns on the S&P 500
returns for the 20 years 1989 to 2008. Here is part of the output for this regression:
The regression equation is EAFE = -2.58 + 0.775 S&P
Analysis of Variance
Source df SS MS
Model 4560.6
Residual
Total 19 8556.0
a. Complete the analysis of variance table by filling in the missing entries. Show (Justify) how you
came up with that answer.
b. What are the values of the regression standard error and the R2?
c. Find the standard error for the least-squares slope. Show your work.
d. If I tell you that the standard deviation of the S&P 500 returns for these years is 19.99%. How
would you use this information to find the standard error for the least-squares slope you found in
part c?
e. Give a 95% confidence interval for the slope β1 of the population regression line. Show your
work.
ECO 480 Econometrics I
Problem Set 5
Due: Monday, November 30, 2015 (beginning of the class)
2
2. An electronic survey of 7,061 players of Guitar Hero and Rock Band reported that 67% of those who
do not currently play a musical instrument said that they are likely to begin playing a real musical
instrument in the next two years. The reports describing the survey do not give the number of
respondents who do not currently play a musical instrument.
a. Explain why it is important to know the number of respondents who do not currently play a
musical instrument.
b. Assume that half of the respondents do not curre ...
Similar to STAT 200 Introduction to Statistics Final Examination, Sp.docx (20)
In this unit, you will experience the powerful impact communication .docxwhitneyleman54422
In this unit, you will experience the powerful impact communication and miscommunication can have on cultural diversity.
Download the Communication: The Journey of Message Template
Follow the template instructions
Demonstrate your understanding of key concepts from the weekly content by including analysis of specific evidence in your responses within the template.
Use in-text citations and APA formatting for all source material references in your template.
Upload the completed template to this assessment.
.
In this task, you will write an analysis (suggested length of 3–5 .docxwhitneyleman54422
In this task, you will write an analysis (
suggested length of 3–5 pages
) of one work of literature. Choose
one
work from the list below:
Classical Period
• Sappho, “The Anactoria Poem” ca. 7th century B.C.E. (poetry)
• Aeschylus, “Song of the Furies” from
The Eumenides
, ca. 458 B.C.E. (poetry)
• Sophocles,
Antigone
, ca. 442 B.C.E. (drama)
• Aristotle, Book 1 from the
Nichomachean Ethics
, ca. 35 B.C.E. (philosophical text)
• Augustus,
The Deeds of the Divine Augustus
, ca. 14 C.E. (funerary inscription)
• Ovid, “The Transformation of Daphne into a Laurel” an excerpt from Book 1 of
The Metamorphoses
, ca. 2 C.E. (poetry)
Renaissance
• Francesco Petrarch, “The Ascent of Mount Ventoux” 1350 (letter)
• Giovanni Pico della Mirandola, the first seven paragraphs of the “Oration on the Dignity of Man” ca. 1486 (essay excerpt)
• Leonardo da Vinci, Chapter 28 “Comparison of the Arts” from
The Notebooks
ca. 1478-1518 (art text)
• Edmund Spenser, Sonnet 30, “My Love is like to Ice” from
Amoretti
1595 (poetry)
• William Shakespeare, Sonnet 18, “Shall I Compare Thee to a Summer’s Day” 1609 (poetry)
• Francis Bacon, “Of Studies” from
The Essays or Counsels…
1625 (essay)
• Anne Bradstreet, “In Honour of that High and Mighty Princess, Queen Elizabeth” 1643 (poetry)
• Andrew Marvell, “To his Coy Mistress” 1681 (poetry)
Enlightenment
• René Descartes, Part 4 from
Discourse on Method
, 1637 (philosophical text)
• William Congreve,
The Way of the World
, 1700 (drama-comedy)
• Jonathan Swift, “A Modest Proposal” 1729 (satirical essay)
• Voltaire, “Micromégas” 1752 (short story, science fiction)
• Phillis Wheatley, “To S.M., a Young African Painter, on Seeing his Works” 1773 (poetry)
• Thomas Paine, “Common Sense” 1776 (essay)
• Johann Wolfgang von Goethe, “The Fisherman” 1779 (poetry)
• Immanuel Kant, “An Answer to the Question: What is Enlightenment?” 1784 (essay)
Romanticism
• Lord Byron, “She Walks in Beauty” 1813 (poetry)
• Samuel Taylor Coleridge, “Kubla Khan” 1816 (poetry)
• Edgar Allan Poe, “The Fall of the House of Usher” 1839 (short story)
• Alexander Dumas,
The Count of Monte Cristo
, 1844 (novel)
• Emily Brontë,
Wuthering Heights
, 1847 (novel)
• Herman Melville, “Bartleby, the Scrivener: A Story of Wall-Street” 1853 (short story)
• Emily Dickinson, “A Narrow Fellow in the Grass” 1865 (poetry)
• Friedrich Nietzsche, Book 4 from
The Joyful Wisdom
, 1882 (philosophical text)
Realism
• Charles Dickens,
A Christmas Carol
, 1843 (novella)
• Karl Marx and Friedrich Engles,
The Communist Manifesto
, 1848 (political pamphlet)
• Christina Rossetti, “Goblin Market” 1862 (poetry)
• Matthew Arnold, “Dover Beach” 1867 (poetry)
• Robert Louis Stevenson,
The Strange Case of Dr. Jekyll and Mr. Hyde
, 1886 (novella)
• Kate Chopin, “The Story of an Hour” 1894 (short story)
• Mark Twain, “The.
In this SLP you will identify where the major transportation modes a.docxwhitneyleman54422
In this SLP you will identify where the major transportation modes are used in the EESC from SLP3: rail, inland water, ocean steamer, and/or OTR.
There are five basic transportation modes: rail, inland water ways, ocean, over-the-road, and air. We will not be concerned about air transport in this SLP as it is the least used and most expensive in general supply chain transportation.
Review and read these resources on these three transportation modes: rail, inland water, and OTR. Ocean is not included in these readings since it is mainly used for importing and exporting. This will be covered in more detail in LOG502. But you are asked to identify where ocean transport is used, but not in detail.
RESOURCES - SEE SLP 3 RESOURCES IN BACKGROUND PAGE
Session Long Project
Review the EESC from SLP2. Identify in the EESC where each of the four modes of transportation are used: rail, inland water, ocean, and OTR. You can use topic headings for each mode. Identify the materials being transported from which industry to which industry. Discuss why this mode is being used and what the costs are on a per ton-mile basis.
SLP Assignment Expectations
The paper should include:
Background:
Briefly
review and discuss the targeted product, company, and industry
Diagram: Include the diagram of the EESC
Transportation Discussion: Discuss each of the four transportation modes (rail, inland water, ocean, OTR) in the EESC and where each one is used. Discuss why this mode is used and the costs of using.
Clarity and Organization: The paper should be well organized and clearly discuss the various topics and issues in depth and breadth.
Use of references and citations: at least six (6) proper references should be used correctly, cited in the text, and listed in the references using proper APA format.
Length: The paper should be three to four pages – the body of the paper excluding title page and references page.
NOTE: You can use the transportation resources. You should also do independent research and find at least two additional appropriate references, for a total of at least six.
SLP Resources
Waterways
American Society of Civil Engineers. (2014). Report card for America’s infrastructure.
Infrastructure Report Card.
Retrieved from
http://www.infrastructurereportcard.org/fact-sheet/inland-waterways
Texas Transportation Institute. (2009). A Modal Comparison Of Domestic Freight Transportation Effects On The General Public, retrieved from
http://www.nationalwaterwaysfoundation.org/study/FinalReportTTI.pdf
U.S. Army Corps of Engineers. (2014). The U.S. Waterway System, Transportation Facts & Information; Navigation Center. Retrieved from
http://www.navigationdatacenter.us/factcard/factcard12.pdf
Railroads
Bureau of Transportation Statistics (Rail), retrieved from
https://www.bts.gov/topics/rail
USDOT (2012). Freight rail: data & resources. Retrieved on 20 Sep 2016 from
https://www.fra.dot.gov/Page/P0365
American Association of Railroads. Ret.
In this module the student will present writing which focuses attent.docxwhitneyleman54422
In this module the student will present writing which focuses attention on himself or herself (personal writing). We will start into college composition by reading a series of essays that explore the rhetorical modes of narration and decscription. If you think about your own lives, you'll note the importance of the stories that surround you. Think of your family's story, your friends' stories, and your very own story. Think of the detail that constitute these stories, of how they engage your sense of taste, touch, sound, smell, and sight. This module will focus on how you can better craft your own story and share it with others.
Competencies Addressed in this Module:
Competency #1: The student will demonstrate an understanding of the writing process by:
Choosing and limiting a subject that can be sufficiently developed within a given time, for a specific purpose, for a specific purpose and audience.
Developing and refining pre-writing and planning skills.ormulating the main point to reflect the subject and purpose of the writing.
Formulating the main point to reflect the subject and purpose of the writing.
Supporting the main point with specific details and arranging them logically.
Writing an effective conclusion.
Competency #3: The student will demonstrate the ability to proofread, edit, and revise by:
Recognizing and correcting errors in clarity
Recognizing and correcting errors in unity and coherence.
Using conventional sentence structure and correcting sentence errors such as fragments, run-ons, comma splices, misplaced modifiers and faulty parallelism.
Recognizing and correcting errors in utilizing the conventions of Standard American English including:
Using standard verb forms and consistent tense.
Maintaining agreement between subject and verb, pronoun and antecedent.
Using proper case forms--consistent point of view.
Using standard spelling, punctuation, and capitalization.
Selecting vocabulary appropriate to audience, purpose, and occasion.
Aditional inf: I am a woma. I am 25 years old. I have a husband and a one year old son
.
In this module, we looked at a variety of styles in the Renaissa.docxwhitneyleman54422
In this module, we looked at a variety of styles in the Renaissance in Italy. Artists like Botticelli, Bellini, Michelangelo, and Bronzino all incorporated Renaissance characteristics into their works, and yet their works look different from each other.
To address form and content in the artistic developments and trends that took place in the Renaissance, look closely at examples from each of these artists.
Choose one painting by one of the artists listed above, and identify characteristics and techniques of the Renaissance style.
Then, address how the work departed from typical Renaissance formulas to become signature to that artist's particular style.
Finally, why did you select this artist? What draws you to their work?
.
In this experiential learning experience, you will evaluate a health.docxwhitneyleman54422
In this experiential learning experience, you will evaluate a healthcare plan using the attached worksheet. The selected plan can be your own health insurance or another plan.
Step 1
Use published information on the selected health insurance plan to complete the
assignment 5.1 worksheet
.
Step 2
Create a 7-10 slide Power Point presentation to include the following:
Introduction to the plan, including geographic boundaries
Major coverage inclusions and exclusions (Medical, Dental, Vision etc.)
Costs to consumer for insurance under the plan (include premiums, deductibles, copays, prescription costs)
Health insurance plan ratings if available. If no ratings are found for this plan, include a possible explanation for this situation.
Evaluation of the health insurance plan-include your evaluation of this plan from two standpoints:
a consumer-focused on costs, coverage, and ease of use
a public health nurse- focused on access to care for populations and improving health outcomes.
Cite all sources in APA format on a reference slide and with on-slide citations.
.
In this essay you should combine your practice responding and analyz.docxwhitneyleman54422
In this essay you should combine your practice responding and analyzing short stories with support derived from research. So far in class, we have practiced primarily formal analysis. Now I want you to practice "joining the conversation." In this essay you will write a literary analysis that incorporates the ideas of others. The trick is to accurately present ideas and interpretations gathered from your research while adding to the conversation by presenting
your own
ideas and analysis.
You will be evaluated based on how well you use external sources. I want to see that you can quote, paraphrase and summarize without plagiarizing. Remember, any unique idea must be credited, even if you put it in your own words.
Choose one of the approaches explained in the "Approaches to Literary Analysis" located at the bottom of this document. Each approach will require research, and that research should provide the context in which you present your own ideas and support your thesis. Be sure to properly document your research. Review the information, notes, and pamphlets I have distributed in class as these will help guide you.
While I am asking you to conduct outside research, do not lose sight of the primary text to which you are responding---the story! Your research should support
your
interpretations of the story. Be sure that your thesis is relevant to the story and that you quote generously from the story.
Purpose:
critical analysis, Argument, writing from sources
Length:
approx 1200 words
Documentation:
Minimum of 4 sources required (one primary source—the story or poem analyzed, and three secondary, peer reviewed journals). (Note: review the material in "finding and evaluating sources.ppt" to help you choose relevant and trustworthy sources.)
Choose from the following short stories:
The Lottery,
Shirley Jackson
A Rose for Emily,
William Faulkner
The Dead
, James Joyce
The Veldt
, Ray Bradbury
Hills Like White Elephants,
Ernest Hemingway
The Cask of Amontillado or The Tell-Tale Heart,
Edgar Allen Poe
Below are some examples.
They are just here to give you an idea of the type of approaches that will work for this essay.
1. Philosophical analysis: How do the stories by Jean Paul Sartre and Albert Camus reflect the philosophy of existentialism?
2. Socio/cultural analysis: What opinion about marriage and gender roles does Hemingway advance in "The Short Happy Life of Francis Macomber"?
3. Historical analysis:: What social dilemmas faced by African Americans in the 1960s might have inspired Toni Cade Bambara to write "The Lesson"?
4. Biographical analysis: What events in Salman Rushdie's life might have influenced the events in "At the Auction of the Ruby Slippers"?
5. Psychological analysis: How is John Cheever's "The Swimmer" a metaphor for the psychology of addiction?
Approaches to Literary analysis
Formal analysis
- This type of analysis focuses on the formal elements of the work (language.
In this Discussion, pick one film to write about and answer ques.docxwhitneyleman54422
In this Discussion, pick one film to write about and answer questions below the film descriptions. If it has been a while since you have seen these films, they are available through online sources and various rental outlets. Although I have provided links to some of the films, I cannot guarantee they are still operable. If the links do not work, try your own online sources.
Dances with Wolves
(1990). Lt. John Dunbar (Kevin Costner) is assigned to the Western frontier on his own request after an act of bravery. He finds himself at an abandoned outpost. At first he maintains strict order using the methods and practices taught to him by the military, but as the film progresses, he makes friends with a nearby Native American tribe, and his perceptions of the military, the frontier, and Native Americans change dramatically.
Working Girl
(1988) Tess McGill (Melanie Griffith) works as a secretary for a large firm involved in acquiring media corporations such as radio and television. When her boss has a skiing accident, Tess gets a chance to use her own ideas and research, ideas that she has been keeping within herself for years – ideas that are arguably better, and more insightful into mass media practices, than her boss’s ideas were.
Schindler’s List
(1993). In Poland during World War II, Oskar Schindler (Liam Neeson) gradually becomes concerned for his Jewish workforce after witnessing their persecution by the Nazis. He initially was motivated by profit, but as the war progressed he began to sympathize with his Jewish workers and attempted to save them. He was credited with saving over 1000 Jews from extermination. (Based on a true story.)
Gran Torino
(2008). Walt Kowalski (Clint Eastwood), a recently widowed Korean War veteran alienated from his family and angry at the world. Walt's young neighbor, an Asian American, is pressured into stealing Walt's prized 1972 Ford Gran Torino by his cousin for his initiation into a gang. Walt thwarts the theft and subsequently develops a relationship with the boy and his family.
Describe the specific theories, assumptions, or “schools of thought” that the characters in the film have. How do their schools of thought differ?
How do the main characters change over the course of a film? How do their goals or desires change? Do they see themselves differently by the end of the film?
Which reflective theory from the course best illustrates the process the main characters go through during the film? How so?
Would you say that the main characters evolved or grew after learning something that was new, or a new approach, a new theory, or a new understanding of their place in the world?
I suggest that you refrain from reiterating the plotline. Rather, stay focused on character changes and the influences on those changes. Be sure to refer to the readings; use proper citations! This discussion will be scored based on the
Grading Rubric for Discussions
Please include the name of your film in the d.
In this assignment, you will identify and interview a family who.docxwhitneyleman54422
In this assignment, you will identify and interview a family who is currently undergoing stress. The stress may arise from a new baby, new marriage, new divorce or separation, new job, new house, having a child with special needs, etc. Explain the assignment to the family and obtain written consent for participation. Please acknowledge that this information will only be used for classroom purposes, that no information will be published or disseminated and that their names will not be used.
Part 1: Interview
Interview family members to gain information about the following:
Family information – nuclear, extended family, ages, siblings, etc.
History – how and when the stress started
Life cycle events – have members describe events and how they responded to them (i.e., beginning of school, IEP, transition times, family events, interaction with siblings)
Family dynamics between members
Strengths of family
Cultural, religious, social networks and involvement
Family needs
Coping strategies
Community resources and support
Family goals for child
Other (i.e., personal stories)
Analyze the family from this information based on current research and theory,
Provide research-based recommendations for the family – this may include continuing things that they are currently doing and may include resources/agencies/supports that they can or could be receiving. Note: These resources can be ones that you are using for your major resource file (see Module 5).
Provide a personal reflection on this experience including the communication skills needed for effective interviewing.
Part 2: Results of the Interview
Create a 6 to 8-page paper (not including title or reference pages) in a Word document for your response.
Use APA format for the title page, references page, and in-text citations.
Develop an introduction and conclusion for your paper.
.
In this assignment, you will assess the impact of health legisla.docxwhitneyleman54422
In this assignment, you will assess the impact of health legislation on nursing practice and communicate your analysis to your peers. GovTrack.us provides a list of federal health bills that are currently in process in Congressional Committees.
CO4: Integrates clinical nursing judgment using effective communication strategies with patients, colleagues, and other healthcare providers. (PO#4)
CO7: Integrates the professional role of leader, teacher, communicator, and manager of care to plan cost-effective, quality healthcare to consumers in structured and unstructured settings. (PO#7)
.
In this assignment, you will create a presentation. Select a topic o.docxwhitneyleman54422
In this assignment, you will create a presentation. Select a topic of your choice from any subject we have covered in this course.
TOPICS..
INTERNET
COMPUTERS
MOBILE AND GAME DEVICES
DATA AND INFORMATION
THE WEB
DIGITAL SECURITY AND PRIVACY
PROGRAMS AND APPS
COMMUNICATION AND NETWORKS
TECHNOLOGY USERS
THE INTERNET
GRAPHICS AND MEDIA APPLICATIONS
FILE, DISK AND SYSTEM MANAGEMENT TOOLS
PROCESSORS
CLOUD COMPUTING
ADAPTERS
POWER SUPPLY AND BATTERIES
WIRELESS SECURITY
Explain why you select this topic.
Explain why this topic is important.
Discuss the advantages and disadvantages of your select topic.
Include any other information you might thing is relative to your topic.
Your presentation should be a minimum of 15-20 slides in length. Include the title, references, images, graphics, and diagrams.
.
In this assignment, the student will understand the growth and devel.docxwhitneyleman54422
In this assignment, the student will understand the growth and development of executive leadership by looking at the dynamics between the president and Congress in the period from the founding to the Spanish-American War. In a 6–8- page paper, the student will focus on: 1) how presidents pursued international relations, 2) how presidents were able to project force, and 3) congressional restrictions on presidential actions. The student may write about the president of his/her choice.
.
In this assignment, I want you to locate two pieces of news detailin.docxwhitneyleman54422
In this assignment, I want you to locate two pieces of news detailing how an organization is responding to the COVID-19 crisis. You will turn this assignment into me via a Word Document attached to a separate email titled "extra credit assignment, Your Name" with your actual name in the subject line so I know to save the email for grading.
You need to analyze how businesses are handling the current COVID-19 crisis and I want to see if you can track down a press release from the organization, an email to their stakeholders, or even a screenshot of their website in which they explicitly address the actions they are taking in light of this new world we find ourselves in. However, the screenshots, hyperlinks to news stories, etc. are only one component of the assignment, your analysis is far and away from the more important component. Once you have tracked down two examples of how a business/organization is responding to the COVID-19 crisis, I want you to tell me how effective you perceive its action to be. Use any of the vocabulary or concepts that we have learned thus far in the semester to support your analysis. For example, is the business/organization using appropriate new media platforms to reach stakeholders? Is communication timely? Is the organization's tone sincere? What could have been done better? I am expecting one page, double-spaced for the length of your analysis, APA format. The images and or hyperlinks you compile will not be counted towards the length of your writing.
.
In this assignment worth 150 points, you will consider the present-d.docxwhitneyleman54422
In this assignment worth 150 points, you will consider the present-day relevance of history with a current event from a legitimate news source (your instructor will provide several options to choose from) and do the following: (1) summarize the article¿s main idea in a paragraph (5 sentences minimum), (2) write two paragraphs in which you utilize your textbook and notes to analyze how your current event selection relates to the past.
the topics are below, just choose one of the topic from list below..
Neanderthals and string
Neanderthals Left Africa Sooner Than We Think?
Discovery of Neanderthal Skeleton and Burial
Searching for Nefertiti
Discovery of Donkeys Used in Polo (Ancient China)
Ancient Maya Capital Found in Backyard
Long Lost Greek City Found
Ancient Roman Weapon
Viking Burial Discovery
Saving Timbuktu's Treasures
.
In the readings thus far, the text identified many early American in.docxwhitneyleman54422
In the readings thus far, the text identified many early American interests in the Middle East from geopolitical to missionary. Using the text and your own research, compare these early interests with contemporary American interests in the Middle East.
In particular, how has becoming 1) a global hegemon after WWII and 2) the concurrent process of ‘secularization’ transformed American foreign policy thought and behavior toward Israel and the Middle East region generally? What themes have remained constant and what appear new? Would you attribute changes more to America’s new geopolitical role after WWII, or to the increasing secularization of American society? Explain carefully. In 500 words
.
In the Roman Colony, leaders, or members of the court, were to be.docxwhitneyleman54422
In the Roman Colony, leaders, or members of the court, were to be:
•Local elites•Be freeborn•Between the ages of 22 – 55•Community resident•Moral integrity
From the members, two were chosen as unpaid chief magistrates (Judges). They would have to “buy into” that position, but the recognition was worth the financial output. This week's discussion prompter is:
Money alone influences others. Please analyze and critically discuss.
In your response, remember that all this is about leadership, the context which is set in Rome.
.
In the provided scenario there are a few different crimes being .docxwhitneyleman54422
In the provided scenario there are a few different crimes being committed and each could be argued multiple ways.
Steve could be charged with attempted murder. He was stabbing Michelle in the chest repeatedly. Due to the details of the scenario his charge could only be attempted because Michelle got up from the attack and charged Stacy. If she later died from her injuries Steve would/could be charged with murder. Even though he was “visibly drunk” he still maintained the purposely, knowing, or reckless intent to cause harm. He was coherent enough to make statements to her about how much he loved her, but still showed an extreme indifference to life and intent cause serious bodily harm. The biggest obstacle to a murder charge for Steve is his death. He cannot be charged with anything if he cannot be alive to defend himself. This takes care of the Steve factor.
Initially Stacy could be found guilty of murder. She knowingly and intentionally took the life of another (Steve). She also expresses an intent to kill when she stated, “I have had enough of you Steve”. From the scenario it is documented that she did not care for Steve and along with her statements, it can be shown that she was “just waiting for the opportunity” to kill Steve. In her favor is the fact that she attempted to stop Steve from harming another person. Her actions, while resulting in the death of another, were in the defense of a harmed person. She possibly saved the life of Michelle by using reasonable force to stop the stabbing.
Michelle could be charged with attempted murder as well. She stabbed Stacey in the chest while screaming, “how dare you”. She intended to cause death or serious physical injury. Again, if Stacey died from the wounds suffered, Michelle could/would be charged with murder. It could also be argued that Michelle had no malice aforethought. She was being stabbed and may not have known her actions were wrong. Her extreme circumstance clouded her reasonable decision making and all she was aware of is that her boyfriend, whom she loved, was just killed. This is unlikely but still a small possibility. Without more facts from the scenario it is difficult to fully play out all possibilities.
respond to this discussion question in 150 words no references please
.
STOP THE MEETING MADNESS HOW TO FREE UP TIME FOR ME.docxwhitneyleman54422
STOP
THE
MEETING
MADNESS
HOW TO FREE UP TIME FOR
MEANINGFUL WORK
BY LESLIE A. PERLOW, CONSTANCE NOONAN HADLEY, AND EUNICE EUN
SHARE THIS ARTICLE. HBR LINK MAKES IT EASY.
SEE PAGE 41 FOR INSTRUCTIONS.
FEATURE STOP THE MEETING MADNESS
62 HARVARD BUSINESS REVIEW JULY–AUGUST 2017
EL
EN
A
K
U
LI
KO
VA
/G
ET
TY
IM
A
G
ES
JULY–AUGUST 2017 HARVARD BUSINESS REVIEW 63
P
Poking fun at meetings is the stuff of Dilbert car-
toons—we can all joke about how soul-sucking and
painful they are. But that pain has real consequences
for teams and organizations. In our interviews with
hundreds of executives, in fields ranging from high
tech and retail to pharmaceuticals and consulting,
many said they felt overwhelmed by their meetings—
whether formal or informal, traditional or agile, face-
to-face or electronically mediated. One said, “I cannot
get my head above water to breathe during the week.”
Another described stabbing her leg with a pencil to
stop from screaming during a particularly torturous
staff meeting. Such complaints are supported by re-
search showing that meetings have increased in length
and frequency over the past 50 years, to the point
where executives spend an average of nearly 23 hours
a week in them, up from less than 10 hours in the
1960s. And that doesn’t even include all the impromptu
gatherings that don’t make it onto the schedule.
Much has been written about this problem, but the
solutions posed are usually discrete: Establish a clear
agenda, hold your meeting standing up, delegate
someone to attend in your place, and so on. We’ve
observed in our research and consulting that real im-
provement requires systemic change, because meet-
ings affect how people collaborate and how they get
their own work done.
Yet change of such scope is rarely considered. When
we probed into why people put up with the strain that
meetings place on their time and sanity, we found
something surprising: Those who resent and dread
meetings the most also defend them as a “necessary
evil”—sometimes with great passion. Consider this
excerpt from the corporate blog of a senior executive
in the pharmaceutical industry:
I believe that our abundance of meetings at our
company is the Cultural Tax we pay for the inclusive,
learning environment that we want to foster…
and I’m ok with that. If the alternative to more
meetings is more autocratic decision-making, less
input from all levels throughout the organization,
and fewer opportunities to ensure alignment and
communication by personal interaction, then give
me more meetings any time!
To be sure, meetings are essential for enabling col-
laboration, creativity, and innovation. They often foster
relationships and ensure proper information exchange.
They provide real benefits. But why would anyone ar-
gue in defense of excessive meetings, especially when
no one likes them much?
Because executives want to be good soldiers. When
they sacrifice their own .
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with .docxwhitneyleman54422
Stoichiometry Lab – The Chemistry Behind Carbonates reacting with Vinegar
Objectives: To visually observe what a limiting reactant is.
To measure the change in mass during a chemical reaction due to loss of a gas.
To calculate CO2 loss and compare actual loss to expected CO2 loss predicted by the balanced chemical equation.
Materials needed: Note: Plan ahead as you’ll need to let Part 1 sit for at least 24 hours.
plastic beaker graduated cylinder
electronic balance 2 eggs
1 plastic cup baking soda (5 g)
dropper vinegar (500mL)
2 identical cups or glasses (at least 500 mL)
Safety considerations: Safety goggles are highly recommended for this lab as baking soda and vinegar chemicals can be irritating to the eyes. If your skin becomes irritated from contact with these chemicals, rinse with cool water for 15 minutes.
Introduction:
The reaction between baking soda and vinegar is a fun activity for young people. Most children (and adults!) enjoy watching the foamy eruption that occurs upon mixing these two household substances. The reaction has often been used for erupting volcanoes in elementary science classes. The addition of food coloring makes it even more fun. The reaction involves an acid-base reaction that produces a gas (CO2). Acid-base reactions typically involve the transfer of a hydrogen ion (H+) from the acid (HA) to the base (B−):
HA + B− --> A− + BH (eq #1)
acid base
The base often (although not always) carries a negative charge. The acid usually (although not always) becomes negatively charged through the course of the reaction because it lost an H+. An example of a typical acid base reaction is below:
HCl(aq) + NaOH(aq) --> NaCl(aq) + H2O(l) (eq #2)
The reaction is actually taking place between the hydrogen ion (H+) and the hydroxide ion (OH−). The chloride and sodium are spectator ions. To write the reaction in the same form as eq #1:
HCl(aq) + OH- --> Cl- + H2O (l) (eq #3)
Sodium bicarbonate (NaHCO3) will dissociate in water to form sodium ion (Na+) and bicarbonate ion (HCO3−).
NaHCO3 --> Na+ + HCO3− (eq #4)
Vinegar is usually a 5% solution of acetic acid in water. The bicarbonate anion (HCO3−) can act as a base, accepting a hydrogen ion from the acetic acid (HC2H3O2) in the vinegar. The Na+ is just a spectator ion and does nothing.
HCO3− + HC2H3O2 --> H2CO3 + C2H3O2− (eq#5)
Bicarbonate acetic acid carbonic acid acetate ion
The carbonic acid that is formed (H2CO3) decomposes to form water and carbon dioxide:
H2CO3 --> H2O(l) + CO2(g) (eq#6)
carbonic acid water carbon dioxide
The latter reaction (production of carbon dioxide) accounts for the bubbles and the foaming that is observed upon mixing vinegar and baki.
Read| The latest issue of The Challenger is here! We are thrilled to announce that our school paper has qualified for the NATIONAL SCHOOLS PRESS CONFERENCE (NSPC) 2024. Thank you for your unwavering support and trust. Dive into the stories that made us stand out!
Welcome to TechSoup New Member Orientation and Q&A (May 2024).pdfTechSoup
In this webinar you will learn how your organization can access TechSoup's wide variety of product discount and donation programs. From hardware to software, we'll give you a tour of the tools available to help your nonprofit with productivity, collaboration, financial management, donor tracking, security, and more.
Francesca Gottschalk - How can education support child empowerment.pptxEduSkills OECD
Francesca Gottschalk from the OECD’s Centre for Educational Research and Innovation presents at the Ask an Expert Webinar: How can education support child empowerment?
Macroeconomics- Movie Location
This will be used as part of your Personal Professional Portfolio once graded.
Objective:
Prepare a presentation or a paper using research, basic comparative analysis, data organization and application of economic information. You will make an informed assessment of an economic climate outside of the United States to accomplish an entertainment industry objective.
Biological screening of herbal drugs: Introduction and Need for
Phyto-Pharmacological Screening, New Strategies for evaluating
Natural Products, In vitro evaluation techniques for Antioxidants, Antimicrobial and Anticancer drugs. In vivo evaluation techniques
for Anti-inflammatory, Antiulcer, Anticancer, Wound healing, Antidiabetic, Hepatoprotective, Cardio protective, Diuretics and
Antifertility, Toxicity studies as per OECD guidelines
Introduction to AI for Nonprofits with Tapp NetworkTechSoup
Dive into the world of AI! Experts Jon Hill and Tareq Monaur will guide you through AI's role in enhancing nonprofit websites and basic marketing strategies, making it easy to understand and apply.
The Roman Empire A Historical Colossus.pdfkaushalkr1407
The Roman Empire, a vast and enduring power, stands as one of history's most remarkable civilizations, leaving an indelible imprint on the world. It emerged from the Roman Republic, transitioning into an imperial powerhouse under the leadership of Augustus Caesar in 27 BCE. This transformation marked the beginning of an era defined by unprecedented territorial expansion, architectural marvels, and profound cultural influence.
The empire's roots lie in the city of Rome, founded, according to legend, by Romulus in 753 BCE. Over centuries, Rome evolved from a small settlement to a formidable republic, characterized by a complex political system with elected officials and checks on power. However, internal strife, class conflicts, and military ambitions paved the way for the end of the Republic. Julius Caesar’s dictatorship and subsequent assassination in 44 BCE created a power vacuum, leading to a civil war. Octavian, later Augustus, emerged victorious, heralding the Roman Empire’s birth.
Under Augustus, the empire experienced the Pax Romana, a 200-year period of relative peace and stability. Augustus reformed the military, established efficient administrative systems, and initiated grand construction projects. The empire's borders expanded, encompassing territories from Britain to Egypt and from Spain to the Euphrates. Roman legions, renowned for their discipline and engineering prowess, secured and maintained these vast territories, building roads, fortifications, and cities that facilitated control and integration.
The Roman Empire’s society was hierarchical, with a rigid class system. At the top were the patricians, wealthy elites who held significant political power. Below them were the plebeians, free citizens with limited political influence, and the vast numbers of slaves who formed the backbone of the economy. The family unit was central, governed by the paterfamilias, the male head who held absolute authority.
Culturally, the Romans were eclectic, absorbing and adapting elements from the civilizations they encountered, particularly the Greeks. Roman art, literature, and philosophy reflected this synthesis, creating a rich cultural tapestry. Latin, the Roman language, became the lingua franca of the Western world, influencing numerous modern languages.
Roman architecture and engineering achievements were monumental. They perfected the arch, vault, and dome, constructing enduring structures like the Colosseum, Pantheon, and aqueducts. These engineering marvels not only showcased Roman ingenuity but also served practical purposes, from public entertainment to water supply.
Operation “Blue Star” is the only event in the history of Independent India where the state went into war with its own people. Even after about 40 years it is not clear if it was culmination of states anger over people of the region, a political game of power or start of dictatorial chapter in the democratic setup.
The people of Punjab felt alienated from main stream due to denial of their just demands during a long democratic struggle since independence. As it happen all over the word, it led to militant struggle with great loss of lives of military, police and civilian personnel. Killing of Indira Gandhi and massacre of innocent Sikhs in Delhi and other India cities was also associated with this movement.
STAT 200 Introduction to Statistics Final Examination, Sp.docx
1. STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 1 of 7
STAT 200
OL4/US2 Sections
Final Exam
Spring 2016
The final exam will be posted at 12:01 am on May 6, and it is
due
at 11:59 pm on May 8, 2016. Eastern Time is our reference
time.
This is an open-book exam. You may refer to your text and
other course materials
as you work on the exam, and you may use a calculator. You
must complete the
exam individually. Neither collaboration nor consultation with
others is allowed.
It is a violation of the UMUC Academic Dishonesty and
Plagiarism policy to use
2. unauthorized materials or work from others.
Answer all 20 questions. Make sure your answers are as
complete as possible.
Show all of your work and reasoning. In particular, when there
are calculations
involved, you must show how you come up with your answers
with critical work
and/or necessary tables. Answers that come straight from
calculators, programs
or software packages will not be accepted. If you need to use
software (for
example, Excel) and /or online or hand-held calculators to aid in
your calculation,
you must cite the sources and explain how you get the results.
Record your answers and work on the separate answer sheet
provided.
This exam has 200 total points; 10 points for each question.
You must include the Honor Pledge on the title page of your
submitted final exam.
Exams submitted without the Honor Pledge will not be
3. accepted.
STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 2 of 7
1. True or False. Justify for full credit.
(a) If P(A) = 0.4 , P(B) = 0.5, and A and B are disjoint, then
P(A AND B) = 0.2.
(b) If all the observations in a data set are identical, then the
variance for this data set is 0.
(c) The mean is always equal to the median for a normal
distribution.
(d) It’s easier to reject the null hypothesis at significance level
of 0.01 than at significance
level of 0.05.
(e) In a two-tailed test, the value of the test statistic is 2. If we
know the test statistic follows a
Student’s t-distribution with P(T >2) = 0.03, then we have
sufficient evidence to reject the
null hypothesis at 0.05 level of significance.
4. 2. Identify which of these types of sampling is used: cluster,
convenience, simple random,
systematic, or stratified. Justify for full credit.
(a) The quality control department of a semiconductor
manufacturing company tests every 100
th
product from the assembly line.
(b) UMUC STAT Club wanted to estimate the study hours of
STAT 200 students. Two STAT 200
sections were randomly selected and all students from these two
sections were asked to fill out
the questionnaire.
(c) A STAT 200 student is interested in the number of credit
cards owned by college students. She
surveyed all of her classmates to collect sample data.
(d) In a career readiness research, 100 students were randomly
selected from the psychology
program, 150 students were randomly selected from the
communications program, and 120
students were randomly selected from cyber security program.
5. 3. The frequency distribution below shows the distribution for
commute time (in minutes) for a
sample of 50 STAT 200 students on a Friday afternoon. (Show
all work. Just the answer,
without supporting work, will receive no credit.)
Commute Time (in minutes) Frequency Relative Frequency
1 – 14.9 5
15 – 29.9 10
30 – 44.9
0.20
45 – 59.9 20
60 or above
Total 50
(a) Complete the frequency table with frequency and relative
frequency. Express the relative
6. frequency to two decimal places.
(b) What percentage of the commute times was at least 30
minutes?
STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 3 of 7
(c) Does this distribution have positive skew or negative skew?
Why?
4. The five-number summary below shows the grade distribution
of two STAT 200 quizzes for a
sample of 500 students.
Minimum Q1 Median Q3 Maximum
Quiz 1 15 35 55 85 100
Quiz 2 20 35 50 90 100
For each question, give your answer as one of the following: (i)
Quiz 1; (ii) Quiz 2; (iii) Both quizzes
have the same value requested; (iv) It is impossible to tell using
only the given information. Then
7. explain your answer in each case.
(a) Which quiz has less range in grade distribution?
(b) Which quiz has the greater percentage of students with
grades 85 and over?
(c) Which quiz has a greater percentage of students with grades
less than 60?
5. A box contains 3 marbles, 1 red, 1 green, and 1 blue.
Consider an experiment that consists of
taking 1 marble from the box, then replacing it in the box and
drawing a second marble from
the box. (Show all work. Just the answer, without supporting
work, will receive no credit.)
(a) List all outcomes in the sample space.
(b) What is the probability that neither marble is red? (Express
the answer in simplest
fraction form)
6. There are 1000 students in a high school. Among the 1000
students, 250 students take AP
Statistics, and 300 students take AP French. 100 students take
8. both AP courses. Let S be the
event that a randomly selected student takes AP Statistics, and F
be the event that a randomly
selected student takes AP French. Show all work. Just the
answer, without supporting work,
will receive no credit.
(a) Provide a written description of the complement event of (S
OR F).
(b) What is the probability of complement event of (S OR F)?
7. Consider rolling two fair dice. Let A be the event that the
sum of the two dice is 8, and B be
the event that the first one lands on 6.
(a) What is the probability that the first one lands on 6 given
that the sum of the two dice is 8?
Show all work. Just the answer, without supporting work, will
receive no credit.
(b) Are event A and event B independent? Explain.
9. STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 4 of 7
8. There are 8 books in the “Statistics is Fun” series. (Show all
work. Just the answer, without
supporting work, will receive no credit).
(a) How many different ways can Mimi arrange the 8 books in
her book shelf?
(b) Mimi plans on bringing two of the eight books with her in a
road trip. How many different
ways can the two books be selected?
9. Assume random variable x follows a probability distribution
shown in the table below.
Determine the mean and standard deviation of x. Show all work.
Just the answer, without
supporting work, will receive no credit.
x -2 0 1 3 5
P(x) 0.1 0.2 0.3 0.1 0.3
10. Mimi plans on growing tomatoes in her garden. She has 15
10. cherry tomato seeds. Based on her
experience, the probability of a seed turning into a seedling is
0.40.
(a) Let X be the number of seedlings that Mimi gets. As we
know, the distribution of X is a
binomial probability distribution. What is the number of trials
(n), probability of successes (p)
and probability of failures (q), respectively?
(b) Find the probability that she gets at least 2 cherry tomato
seedlings. (round the answer to 3
decimal places) Show all work. Just the answer, without
supporting work, will receive no credit.
11. Assume the weights of men are normally distributed with a
mean of 172 lbs and a standard
deviation of 30 lbs. Show all work. Just the answer, without
supporting work, will receive no
credit.
(a) Find the 90
th
percentile for the distribution of men’s weights.
11. (b) What is the probability that a randomly selected man weighs
more than 185 lbs?
12. Assume the IQ scores of adults are normally distributed
with a mean of 100 and a standard
deviation of 15. Show all work. Just the answer, without
supporting work, will receive no credit.
(a) If a random sample of 25 adults is selected, what is the
standard deviation of the sample mean?
(b) What is the probability that 25 randomly selected adults will
have a mean IQ score that is
between 95 and 105?
13. A survey showed that 80% of the 1600 adult respondents
believe in global warming. Construct a
95% confidence interval estimate of the proportion of adults
believing in global warming. Show
all work. Just the answer, without supporting work, will receive
no credit.
STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 5 of 7
12. 14. In a study designed to test the effectiveness of acupuncture
for treating migraine, 100 patients
were randomly selected and treated with acupuncture. After
one-month treatment, the number of
migraine attacks for the group had a mean of 2 and standard
deviation of 1.5. Construct a 95%
confidence interval estimate of the mean number of migraine
attacks for people treated with
acupuncture. Show all work. Just the answer, without
supporting work, will receive no credit.
15. Mimi is interested in testing the claim that more than 75%
of the adults believe in global
warming. She conducted a survey on a random sample of 100
adults. The survey showed that
80 adults in the sample believe in global warming.
Assume Mimi wants to use a 0.05 significance level to test the
claim.
(a) Identify the null hypothesis and the alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the
13. correct test statistic, without supporting
work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing
the correct P-value, without
supporting work, will receive no credit.
(d) Is there sufficient evidence to support the claim that more
than 75% of the adults believe in
global warming? Explain.
16. In a study of memory recall, 5 people were given 10 minutes
to memorize a list of 20 words.
Each was asked to list as many of the words as he or she could
remember both 1 hour and 24
hours later. The result is shown in the following table.
Number of Words Recalled
Subject 1 hour later 24 hours later
1 14 12
2 18 15
3 11 9
4 13 12
14. 5 12 12
Is there evidence to suggest that the mean number of words
recalled after 1 hour exceeds the
mean recall after 24 hours?
Assume we want to use a 0.10 significance level to test the
claim.
(a) Identify the null hypothesis and the alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the
correct test statistic, without supporting
work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing
the correct P-value, without
supporting work, will receive no credit.
STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 6 of 7
(d) Is there sufficient evidence to support the claim that the
mean number of words recalled after 1
hour exceeds the mean recall after 24 hours? Justify your
conclusion.
15. 17. In a pulse rate research, a simple random sample of 40 men
results in a mean of 80 beats per
minute, and a standard deviation of 11.3 beats per minute.
Based on the sample results, the
researcher concludes that the pulse rates of men have a standard
deviation greater than 10 beats
per minutes. Use a 0.05 significance level to test the
researcher’s claim..
(a) Identify the null hypothesis and alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the
correct test statistic, without
supporting work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing
the correct P-value, without
supporting work, will receive no credit.
(d) Is there sufficient evidence to support the researcher’s
claim? Explain.
18. The UMUC MiniMart sells four different types of teddy
bears. The manager reports that the
four types are equally popular. Suppose that a sample of 500
16. purchases yields observed counts
150, 120, 110, and 120 for types 1, 2, 3, and 4, respectively.
Type 1 2 3 4
Number 150 120 110 120
Assume we want to use a 0.05 significance level to test the
claim that the four types are
equally popular.
(a) Identify the null hypothesis and the alternative hypothesis.
(b) Determine the test statistic. Show all work; writing the
correct test statistic, without
supporting work, will receive no credit.
(c) Determine the critical value. Show all work; writing the
correct critical value, without
supporting work, will receive no credit.
(d) Is there sufficient evidence to support the manager’s claim
that the four types are equally
popular? Justify your answer.
19. A random sample of 4 professional athletes produced the
following data where x is the number
17. of endorsements the player has and y is the amount of money
made (in millions of dollars).
x 0 1 2 5
y 1 2 4 8
(a) Find an equation of the least squares regression line. Show
all work; writing the correct
equation, without supporting work, will receive no credit.
(b) Based on the equation from part (a), what is the predicted
value of y if x = 3? Show all work
and justify your answer.
STAT 200: Introduction to Statistics Final Examination,
Spring 2016 OL4 Page 7 of 7
20. A study of 10 different weight loss programs involved 500
subjects. Each of the 10 programs had
50 subjects in it. The subjects were followed for 12 months.
Weight change for each subject was
recorded. Mimi wants to test the claim that the mean weight
18. loss is the same for the 10 programs.
(a) Complete the following ANOVA table with sum of squares,
degrees of freedom, and mean
square (Show all work):
Source of
Variation
Sum of Squares
(SS)
Degrees of
Freedom (df)
Mean Square
(MS)
Factor
(Between)
42.36
Error
(Within)
19. Total 1100.76
N/A
(b) Determine the test statistic. Show all work; writing the
correct test statistic, without supporting
work, will receive no credit.
(c) Determine the P-value for this test. Show all work; writing
the correct P-value, without
supporting work, will receive no credit.
(d) Is there sufficient evidence to support the claim that the
mean weight loss is the same for the
10 programs at the significance level of 0.05? Explain.
STAT 200 Final ExaminationSpring 2016 OL4/US2Page 1 of 9
STAT 200 Introduction to Statistics
Name______________________________
Final Examination: Spring 2016 OL4/US2 Instructor
__________________________
Answer Sheet
Instructions:
This is an open-book exam. You may refer to your text and
other course materials as you work on the exam, and you may
use a calculator.
Record your answers and work in this document.
Answer all 20 questions. Make sure your answers are as
complete as possible. Show all of your work and reasoning. In
20. particular, when there are calculations involved, you must show
how you come up with your answers with critical work and/or
necessary tables. Answers that come straight from calculators,
programs or software packages will not be accepted. If you need
to use software (for example, Excel) and /or online or hand-held
calculators to aid in your calculation, please cite the source and
explain how you get the results.
When requested, show all work and write all answers in the
spaces allotted on the following pages. You may type your
work using plain-text formatting or an equation editor, or you
may hand-write your work and scan it. In either case, show
work neatly and correctly, following standard mathematical
conventions. Each step should follow clearly and completely
from the previous step. If necessary, you may attach extra
pages.
You must complete the exam individually. Neither
collaboration nor consultation with others is allowed. It is a
violation of the UMUC Academic Dishonesty and Plagiarism
policy to use unauthorized materials or work from others. Your
exam will receive a zero grade unless you complete the
following honor statement.
Please sign (or type) your name below the following honor
statement:
I understand that it is a violation of the UMUC Academic
Dishonesty and Plagiarism policy to use unauthorized materials
or work from others. I promise that I did not discuss any aspect
of this exam with anyone other than my instructor. I further
promise that I neither gave nor received any unauthorized
assistance on this exam, and that the work presented herein is
entirely my own.
Name _____________________Date___________________
Record your answers and work.