Percentiles are positional measures used to indicate an individual's position within a group. They divide a data set into 100 equal parts, with percentiles (denoted Px) indicating what percent of values are less than a specified value. Common percentiles include the median (P50), quartiles (P25, P50, P75), and deciles. Percentiles are calculated using a formula that determines the position number based on the total number of data points and percentile value. This position is then used to find the corresponding value within ordered data.
Distinguish between Parameter and Statistic.
Calculate sample variance and sample standard deviation.
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This presentation gives you a brief idea;
-definition of frequency distribution
- types of frequency distribution
-types of charts used in the distribution
-a problem on creating types of distribution
-advantages and limitations of the distribution
One of the three points that divide a data set into four equal parts. Or the values that divide data into quarters. Each group contains equal number of observations or data. Median acts as base for calculation of quartile.
The Normal Distribution is a symmetrical probability distribution where most results are located in the middle and few are spread on both sides. It has the shape of a bell and can entirely be described by its mean and standard deviation.
Distinguish between Parameter and Statistic.
Calculate sample variance and sample standard deviation.
Visit the website for more services: https://cristinamontenegro92.wixsite.com/onevs
This presentation gives you a brief idea;
-definition of frequency distribution
- types of frequency distribution
-types of charts used in the distribution
-a problem on creating types of distribution
-advantages and limitations of the distribution
One of the three points that divide a data set into four equal parts. Or the values that divide data into quarters. Each group contains equal number of observations or data. Median acts as base for calculation of quartile.
The Normal Distribution is a symmetrical probability distribution where most results are located in the middle and few are spread on both sides. It has the shape of a bell and can entirely be described by its mean and standard deviation.
Pairing aermod concentrations with the 50th percentile monitored valueSergio A. Guerra
Presentation delivered to the Background Concentrations Workgroup for Air Dispersion Modeling organized by the Minnesota Pollution Control Agency. delivered on May 29, 2014. Three topics covered include 1) Screening monitoring data, 2) AERMOD’s time-space mismatch, and
3) Proposed 50th % Bkg Method
In the previous lesson we discussed a measure of location known as the measure of central tendency. There are other measures of location which are useful in describing the distribution of the data set. These measures of location include the maximum, minimum, percentiles, deciles and quartiles. How to compute and interpret these measures are also discussed in this lesson.
Question 1 of 201.0 PointsA sample of 20 observations has a st.docxhildredzr1di
Question 1 of 20
1.0 Points
A sample of 20 observations has a standard deviation of 4. The sum of the squared deviations from the sample mean is:
A.
320
B.
304
C.
288
D.
400
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Question 2 of 20
1.0 Points
Suppose that a histogram of a data set is approximately symmetric and "bell shaped". Approximately, what percent of the observations are within three standard deviations of the mean?
A.
50%
B.
99.7%
C.
95%
D.
68%
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Question 3 of 20
1.0 Points
Which of the following correctly describes the relationship between a sample and a population?
A.
A sample is a group of populations that are subject to observation.
B.
A population and a sample are not related.
C.
A population is a group of samples that may or may not be included in a study
D.
A sample is a group of subjects selected from a population to be studied.
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Question 4 of 20
1.0 Points
A histogram that has a single peak and looks approximately the same to the left and right of the peak is called:
A.
bimodal
B.
symmetric
C.
proportional
D.
balanced
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Question 5 of 20
1.0 Points
Which of the following statements is true for the following data values: 7, 5, 6, 4, 7, 8, and 12?
A.
Only the mean and median are equal
B.
The mean, median and mode are all equal
C.
Only the median and mode are equal
D.
Only the mean and mode are equal
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Question 6 of 20
1.0 Points
If a variable has possible values –2, 6, and 17, then this variable is
A.
both a continuous and a discrete variable
B.
a discrete variable
C.
neither a continuous nor a discrete variable
D.
a continuous variable
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Question 7 of 20
1.0 Points
Which of the following statements is true regarding the data set 10, 10, 10, 10, and 10?
A.
The range is zero
B.
The standard deviation equals zero
C.
The interquartile range equals zero
D.
all of the above
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Question 8 of 20
1.0 Points
Gender and State are examples of which type of data?
A.
Discrete data
B.
Continuous data
C.
Categorical data
D.
Ordinal data
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Question 9 of 20
1.0 Points
If a value represents the 95th percentile, this means that
A.
95% of the time you will observe this value
B.
95% of all values are below this value
C.
95% of all values are above this value
D.
there is a 5% chance that this value is incorrect
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Question 10 of 20
1.0 Points
A scatter plot would be useful for
A.
Showing the trend of sales, over time, of five different brands of blank DVDs
B.
Showing the relationship between the sales of blank CDs and blank DVDs
C.
Showing the top selling brands of blank DVDs
D.
Showing the relative number of sales of four different brands of blank DVDs
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Question 11 of 20
1.0 Points
Which of the following indicates how many observations fall into various categories?
A.
The frequency table
B.
The tabulation scale
C.
The Likert scale
D.
The sample table
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Part 1 of 16 - Question 1 of 231.0 PointsThe data pres.docxherbertwilson5999
Part 1 of 16 -
Question 1 of 23
1.0 Points
The data presented in the table below resulted from an experiment in which seeds of 5 different types were planted and the number of seeds that germinated within 5 weeks after planting was recorded for each seed type. At the .01 level of significance, is the proportion of seeds that germinate dependent on the seed type?
Seed Type
Observed Frequencies
Germinated
Failed to Germinate
1
31
7
2
57
33
3
87
60
4
52
44
5
10
19
A.Yes, because the test value 16.86 is greater than the critical value of 13.28
B.Yes, because the test value 16.86 is less than the critical value of 14.86
C.No, because the test value 16.86 is greater than the critical value of 13.28
D.No, because the test value 13.28 is less than the critical value of 16.86
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Question 2 of 23
1.0 Points
The chi-square goodness-of-fit test can be used to test for:
A.significance of sample statistics
B.normality
C.difference between population variances
D.difference between population means
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Part 2 of 16 -
Question 3 of 23
1.0 Points
The marketing manager of a large supermarket chain would like to use shelf space to predict the sales of pet food. For a random sample of 12 similar stores, she gathered the following information regarding the shelf space, in feet, devoted to pet food and the weekly sales in hundreds of dollars.
Store
1
2
3
4
5
6
Shelf Space
5
5
5
10
10
10
Weekly Sales
1.6
2.2
1.4
1.9
2.4
2.6
Store
7
8
9
10
11
12
Shelf Space
15
15
15
20
20
20
Weekly Sales
2.3
2.7
2.8
2.6
2.9
3.1
What is the estimated regression equation?
A. = 1.45 + 0.074x
B. = 2.63 - 0.174x
C. = 2.63 + 0.724x
D. = 1.45 + 0.724x
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Question 4 of 23
1.0 Points
A single variable X can explain a large percentage of the variation in some other variable Y when the two variables are:
A.highly correlated
B.directly related
C.inversely related
D.mutually exclusive
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Question 5 of 23
1.0 Points
Data for a sample of 25 apartments in a particular neighborhood are provided in the worksheet Apartments in the Excel workbook Apartments.xlsx. Using that data, find the estimated regression equation which can be used to estimate the monthly rent for apartments in this neighborhood using size as the predictor variable.
Apartments.xlsx
A. 177.12 + 1.065(size)
B.177.12 + 0.8500(size)
C.1.065 + 177.12(size)
D.197.12 + 2.065(size)
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Part 3 of 16 -
Question 6 of 23
1.0 Points
A pharmaceutical company is testing the effectiveness of a new drug for lowering cholesterol. As part of this trial, they wish to determine whether there is a difference between the effectiveness for women and for men. Assume α = 0.05. What is the test value?
Women
Men
Sample size
50
80
Mean effect
7
6.95
Sample variance
3
4
A.t = 3.252
B.t = 0.151
C.z = 0.081
D.z = 0.455
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Question 7 of 23
.
Model Attribute Check Company Auto PropertyCeline George
In Odoo, the multi-company feature allows you to manage multiple companies within a single Odoo database instance. Each company can have its own configurations while still sharing common resources such as products, customers, and suppliers.
Instructions for Submissions thorugh G- Classroom.pptxJheel Barad
This presentation provides a briefing on how to upload submissions and documents in Google Classroom. It was prepared as part of an orientation for new Sainik School in-service teacher trainees. As a training officer, my goal is to ensure that you are comfortable and proficient with this essential tool for managing assignments and fostering student engagement.
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
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!
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.
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.
Palestine last event orientationfvgnh .pptxRaedMohamed3
An EFL lesson about the current events in Palestine. It is intended to be for intermediate students who wish to increase their listening skills through a short lesson in power point.
2. Percentiles are positional measures used mainly in
educational and health-related fields to indicate the
position of an individual in a group.
For example, the graphs and tables show the
percentiles for various measures such as test scores,
height or weight.
3. Percentiles (denoted
Px) divide a set of data
into 100 equal parts.
They are used as
positional measures
to indicate what
percent of the data
set have a value less
than a specified value.
Percentiles are not the same as percentages.
For example, if a student gets 72 correct
answers out of 100 on a test they earn 72%.
If a score of 72 correct answers corresponds to
the 64th percentile, then they did better than
64% of the students in the class, but still
received a score of 72%.
80% of the people are
shorter than “you”
4. Special Cases
•The median is the value that is
in the halfway position of a
data set. Median = P50
•The quartiles are the values
that are in the quarter
positions of a data set.
First Quartile = Q1 = P25
Third Quartile = Q2 = P75
•The deciles are the values that
are in the positions that
divided the data into 10 pieces.
D1 = P10
D2 = P20
…
D10 = P100
Some frequently used percentiles have specific names:
5. Formula
Provided data is ordered least to
greatest, the position number of
the percentiles can be calculated
using the formula:
With percentiles, there are two items
of interest:
1. the position of the percentile
(found using the formula), and
2. the value of the percentile (for
example, P50 = 139, means the 50th
percentile has a value
1
Position number of P
100
x
n
x
6. Calculating Percentiles
The following data lists the
number of calories in 22
manufactures vanilla-flavoured
ice cream bars.
Given the data above
determine:
a) the median
b) the first quartile
c) the third quartiles
d) the fourth decile
7. Calculating Percentiles
a) the median
50
22 1
Position number of P 50
100
11.5
th th th
50P 11 value + 0.5 12 value -11 value
209 0.5 234 209
221.5
11th & 12th
positions
8. Calculating Percentiles
b) the first quartile
25
22 1
Position number of P 25
100
5.75
th th th
25P 5 value + 0.75 6 value -5 value
151 0.75 179 151
172
5th & 6th
positions
9. Calculating Percentiles
c) the third quartile
75
22 1
Position number of P 75
100
17.25
th th th
75P 17 value + 0.25 18 value -17 value
319 0.25 337 319
323.5
17th & 18th
positions
10. Calculating Percentiles
d) the fourth decile
40
22 1
Position number of P 40
100
9.2
th th th
40P 9 value + 0.2 10 value -9 value
197 0.2 201 197
197.8
9th & 10th
positions