Exam #1 (covers chapters 1-5), Math 140 Spring 2015, CS.docxMARRY7
Exam #1 (covers chapters 1-5), Math 140
Spring 2015, CSUN
Show All Work! Name:___________________________
Seat Number:_____________________
Papers without name/seat number would lose 10 points. Write your name and seat number now.
You must show all work for full credit.
1) Define the following term: Stratified Random Sample. (6 points)
2) The amount of cash (rounded to whole dollars) carried by each student in a simple random sample of CSUN’s
students who take MWF classes are given below: 3, 5, 8, 11, 4, 11, 9, 6, 9, 21, 24, 32, 23, 18, 25, 17, 2, 1, 30,
15, 27, 28, 32, 16, 20, 8, 5, 2, 20, 15.
A) Construct a relative frequency distribution table, with the first class having a lower class limit of 1 and a
class width of 6. (8 points)
B) Construct a relative cumulative frequency distribution related to part (A). (4 points)
C) Construct a histogram and a pie chart for the data set in part A, use relative frequency for both graphs. (8
points)
2
3) The average distance of students living away from campus is 10 miles. If the standard deviation is 2.5 miles,
what are the z-scores for two students who live 14 and 20 miles away from campus? Are these z-scores usual
or unusual? Explain why or why not. (8 points)
4) The following frequency distribution shows the ages of the employees working in a movie production company
in Hollywood. Treating these data as a sample of employees in movie industry, A) compute the mean, and
standard deviation. Comment on age distribution of the employees. Explain. (12 points)
Age Frequency
20 - 24 11
25 - 29 19
30 - 34 25
35 - 39 20
40 - 44 10
3
5) Find the 5-number summary for the data: 2, 8, 5, 10, 15, 9, 21, 32, 17, 18, 24, 43, 28, 20. Indicate any outliers
by calculating upper and lower fences and mark all these information on a boxplot. (16 points)
4
6) Let X be the number children with green eyes in a family of four children whose one of their parents has green
eyes. Is the following a probability distribution? If yes, then find its mean and standard deviation. If not,
explain why not. (13 points)
X P(X)
0 0.35
1 0.25
2 0.20
3 0.15
4 0.05
7) A family has three children, find the probability of having at least two boys. Write the sample space, first. (10
points)
5
8) A recent survey indicates that 55% of adults ages 40-49 live alone. A) If we randomly select 10 adults from
that age group, what is the probability that at least one of them lives alone? B) Is it unusual to randomly select
10 adults from that age group to find that at least 1 of them lives alone? Why or why not? C) Find mean and
standard deviation when n is 10 and p = 0.55. (15 points)
€
x =
Σx
n
...
Exam #1 (covers chapters 1-5), Math 140 Spring 2015, CS.docxMARRY7
Exam #1 (covers chapters 1-5), Math 140
Spring 2015, CSUN
Show All Work! Name:___________________________
Seat Number:_____________________
Papers without name/seat number would lose 10 points. Write your name and seat number now.
You must show all work for full credit.
1) Define the following term: Stratified Random Sample. (6 points)
2) The amount of cash (rounded to whole dollars) carried by each student in a simple random sample of CSUN’s
students who take MWF classes are given below: 3, 5, 8, 11, 4, 11, 9, 6, 9, 21, 24, 32, 23, 18, 25, 17, 2, 1, 30,
15, 27, 28, 32, 16, 20, 8, 5, 2, 20, 15.
A) Construct a relative frequency distribution table, with the first class having a lower class limit of 1 and a
class width of 6. (8 points)
B) Construct a relative cumulative frequency distribution related to part (A). (4 points)
C) Construct a histogram and a pie chart for the data set in part A, use relative frequency for both graphs. (8
points)
2
3) The average distance of students living away from campus is 10 miles. If the standard deviation is 2.5 miles,
what are the z-scores for two students who live 14 and 20 miles away from campus? Are these z-scores usual
or unusual? Explain why or why not. (8 points)
4) The following frequency distribution shows the ages of the employees working in a movie production company
in Hollywood. Treating these data as a sample of employees in movie industry, A) compute the mean, and
standard deviation. Comment on age distribution of the employees. Explain. (12 points)
Age Frequency
20 - 24 11
25 - 29 19
30 - 34 25
35 - 39 20
40 - 44 10
3
5) Find the 5-number summary for the data: 2, 8, 5, 10, 15, 9, 21, 32, 17, 18, 24, 43, 28, 20. Indicate any outliers
by calculating upper and lower fences and mark all these information on a boxplot. (16 points)
4
6) Let X be the number children with green eyes in a family of four children whose one of their parents has green
eyes. Is the following a probability distribution? If yes, then find its mean and standard deviation. If not,
explain why not. (13 points)
X P(X)
0 0.35
1 0.25
2 0.20
3 0.15
4 0.05
7) A family has three children, find the probability of having at least two boys. Write the sample space, first. (10
points)
5
8) A recent survey indicates that 55% of adults ages 40-49 live alone. A) If we randomly select 10 adults from
that age group, what is the probability that at least one of them lives alone? B) Is it unusual to randomly select
10 adults from that age group to find that at least 1 of them lives alone? Why or why not? C) Find mean and
standard deviation when n is 10 and p = 0.55. (15 points)
€
x =
Σx
n
...
Asesoría para el uso de las tic en el aulaIbel Orellana
Asesoría para el uso de las TIC en el aula.
Técnicas de Información y Comunicación.
Docencia actual.
Educación Actual.
El Rol del Docente y la Tecnología
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.
Synthetic Fiber Construction in lab .pptxPavel ( NSTU)
Synthetic fiber production is a fascinating and complex field that blends chemistry, engineering, and environmental science. By understanding these aspects, students can gain a comprehensive view of synthetic fiber production, its impact on society and the environment, and the potential for future innovations. Synthetic fibers play a crucial role in modern society, impacting various aspects of daily life, industry, and the environment. ynthetic fibers are integral to modern life, offering a range of benefits from cost-effectiveness and versatility to innovative applications and performance characteristics. While they pose environmental challenges, ongoing research and development aim to create more sustainable and eco-friendly alternatives. Understanding the importance of synthetic fibers helps in appreciating their role in the economy, industry, and daily life, while also emphasizing the need for sustainable practices and innovation.
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.
Acetabularia Information For Class 9 .docxvaibhavrinwa19
Acetabularia acetabulum is a single-celled green alga that in its vegetative state is morphologically differentiated into a basal rhizoid and an axially elongated stalk, which bears whorls of branching hairs. The single diploid nucleus resides in the rhizoid.
2. UNIDAD EDUCATIVA PÚBLICA
“GENERAL MEDARDO ALFARO”
DIAGNOSTIC ASSESSMENT
CLASS
NAME
DATE
LISTENING
:
:
:
8th grade EGEB
a) Listen and Complete sentences with greetings. (Escuche y complete las oraciones con los saludos).
………………………………….I am Carlos
………………………………….I am Daniel
………………………………….I am Rocio
………………………………….I am Francisco
………………………………….I am Santiago
b) Circle the number that you heard. (Encierre los número que escucha)
12 23 45 31 8 11 2 67 29 13 30 11 87 34 5 21 90 45 78 1
READING
a) Underline the color. (Subraye los colores)
Hello I am Mónica. I am a student. My favorite colour is green. I have a black school bag. I have a
yellow pencil. I have a pink ruler. I have a red pen. My friend has an orange eraser.
b) Match with lines the correct. (Una con una línea lo correcto)
I
is a teacher
YOU
am a student
HE
is a table
SHE
are friends
IT
are happy
WE
are tall
THEY
is an engineer
WRITING
a) FamilyMembers (Miembros de la familia)
3. ………………………………………………………………
…………………………………………………………………………….…
b) Escriba sus datos personales (Escriba sus datos personales)
……………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………
GRAMMAR
a) Order the following stamtements. (Ordenelassiguientesoraciones)
twelve - am - I
Jose - mechanic - is – a
Tall – he – is
Happy - are - they
b) Use the next articles (Use los siguientesartículos)
an - a - the
………………….. apple
……………………students
……………………engineer
…………………..car
VOCABULARY
Whatisthis?
----------------------------------
----------------------------------
-------------------------------------------
----------------------------------
4. UNIDAD EDUCATIVA PÚBLICA
“GENERAL MEDARDO ALFARO”
DIAGNOSTIC ASSESSMENT
NAME
TEACHER
SUBJECT
DATE
LISTENING
:
:
: ENGLISH
:
QUIMESTRE
CLASS
PARALLEL
ESPECIALITY
:
:
:
:
SCORE
th
9 grade EGEB
A
a) Circle the number that you heard. (Encierre los número que escucha)
1 points
12 23 45 31 8 11 2 67 29 13 30 11 87 34 5 21 90 45 78 1
b) Mark the times that you heard (Marque lashorasqueescuche)
…………………………………
1 point
…………………………………………
READING
a) Underline the member of the family. (Subraye los miembros de la familia)
1points
My family is well diversified. Every family member plays an important role in all my family’s lives. In my
family, there are four people: my father, my mother, my little brother and me. My father is one who
brings money home and is also responsible for organizing and planning family trips. My mother is the
one who is in charge for making meals and makes sure everyone eats at the appropriate times. My
little brother is the pet of the family. He actually doesn’t have any responsibilities, for he’s the pet. I am
the rock of support in my family. I always go beyond my parents’ expectations. I
alsosupportmyyoungercousins and littlebrother.
b) Match with lines the correct. (Una con una línea lo correcto)
I
YOU
HE
SHE
IT
WE
THEY
is a teacher
am a student
is a table
are friends
are happy
are tall
is an engineer
2 points
5. WRITING
a) Actionverbs (Verbos de acción)
1 point
………………………………… ………………………………………………………………………… ………………………………….…
b) Escriba sus datos personales (Escriba sus datos personales)
2 points
……………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………
……………………………………………………………………………………………………………………………………………………………
GRAMMAR
a) Order the following stamtements. (Ordene las siguientes oraciones)
1 point
twelve - am - I
Jose - mechanic - is – a
Goes– he – to school
English – I – study
b) Use the next articles (Use los siguientes artículos)
an - a - the
………………… apple
…………………students
…………………engineer
…………………car
1 point