Question 1

Ages of Workers: The ages (in years) of three groups of workers are shown below:
  
-Compute and compare the ranges for the three groups.

Accepted Answer

Range = 6, 15, and 33 (years) for Groups

Question 2

Which measure of central location can be used for both interval and nominal variables?

Accepted Answer

A)  The mean 
B)  The median 
C)  The mode 
D)  All of these choices are true. 
A)  The mean 
B)  The median 
C)  The mode 
D)  All of these choices are true.

Question 3

Compute the range and coefficient of variation.

Accepted Answer

Range = 43

Question 4

In a histogram, the proportion of the total area which must be to the left of the median is:

Accepted Answer

A)  exactly 0.50. 
B)  less than 0.50 if the distribution is negatively skewed. 
C)  more than 0.50 if the distribution is positively skewed. 
D)  unknown. 
A)  exactly 0.50. 
B)  less than 0.50 if the distribution is negatively skewed. 
C)  more than 0.50 if the distribution is positively skewed. 
D)  unknown.

Question 5

How often can we expect between 49 and 61 containers to be sold in a day? (Give a percentage.)

Accepted Answer

Approximat

Question 6

The interquartile range is an interval of numbers starting at Q1 and ending at Q3.

Accepted Answer

A) True 
 B)False

Question 7

Weights of Police Officers: The following data represent the weights in pounds of a sample of 25 police officers: 164, 148, 137, 157, 173, 156, 177, 172, 169, 165, 145, 168, 163, 162, 174, 152, 156, 168, 154, 151, 174, 146, 134, 140, and 171.
-Calculate the 3rd and 7th deciles of the data.

Accepted Answer

Location = L₃₀ = 7.8, and val

Question 8

The coefficient of variation is a measure of variability.

Accepted Answer

A) True 
 B)False

Question 9

Ages of Jockeys: The following data represent the ages in years of a sample of 25 jockeys from a local race track: 31, 43, 56, 23, 49, 42, 33, 61, 44, 28, 48, 38, 44, 35, 40, 64, 52, 42, 47, 39, 53, 27, 36, 35, and 20.
-A.Construct a box plot for the ages and identify any extreme values.
B.What does the box plot tell you about the distribution of the data?

Accepted Answer

A. The box plot lies below. Th

Question 10

Quartiles divide the observations in a data set into four parts with the same amount of data in each part.

Accepted Answer

A) True 
 B)False

Question 11

Any points that lie outside the whiskers on a box plot are called ____________________.

Accepted Answer

The answer of Any points that lie outside the whiskers...

Question 12

Strip Mall Rent: Monthly rent data in dollars for a sample of 10 stores in a small town in South Dakota are as follows: 220, 216, 220, 205, 210, 240, 195, 235, 204, and 250.
-Compute the sample median.

Accepted Answer

The answer of Strip Mall Rent: Monthly rent data in...

Question 13

The mean of a sample of 15 measurements is 35.6 feet. Suppose that the sample is enlarged to 16 measurements, by including one additional measurement having a value of 42 feet. Find the mean of the sample of the 16 measurements.

Accepted Answer

The answer of The mean of a sample of 15...

Question 14

The line drawn within the box of a box plot always represents the median.

Accepted Answer

A) True 
 B)False

Question 15

Hours of Playing Video Games: Suppose that the following data provide the hours of playing video games per week for a sample of 15 high school students in Roanoke, Virginia: 5, 11, 25, 19, 18, 20, 27, 13, 8, 10, 15, 19, 18, 9, and 12.
-Determine the location and value of the third quartile.

Accepted Answer

Location =

Question 16

Lily has been keeping track of what she spends to eat out. The last week's expenditures for meals eaten out were $5.69, $5.95, $6.19, $10.91, $7.49, $14.53, and $7.66. The mean amount Lily spends on meals is $8.35.

Accepted Answer

A) True 
 B)False

Question 17

Weights of Police Officers: The following data represent the weights in pounds of a sample of 25 police officers: 164, 148, 137, 157, 173, 156, 177, 172, 169, 165, 145, 168, 163, 162, 174, 152, 156, 168, 154, 151, 174, 146, 134, 140, and 171.
-Describe the shape of the distribution of weights based on the quartiles' values.

Accepted Answer

Since Q₂ - Q_1<

Question 18

Which of the following statements is true for the following observations: 9, 8, 7, 9, 6, 11, and 13?

Accepted Answer

A)  The mean, median and mode are all equal. 
B)  Only the mean and median are equal. 
C)  Only the mean and mode are equal 
D)  Only the median and mode are equal. 
A)  The mean, median and mode are all equal. 
B)  Only the mean and median are equal. 
C)  Only the mean and mode are equal 
D)  Only the median and mode are equal.

Question 19

If the first and second quartiles are farther apart than the second and third quartiles, the shape of the histogram based on the quartiles is ____________________.

Accepted Answer

The answer of If the first and second quartiles are...

Question 20

Ages of Jockeys: The following data represent the ages in years of a sample of 25 jockeys from a local race track: 31, 43, 56, 23, 49, 42, 33, 61, 44, 28, 48, 38, 44, 35, 40, 64, 52, 42, 47, 39, 53, 27, 36, 35, and 20.
-A.Construct a relative frequency histogram for the data.
B.What does the histogram tell you about the distribution of the data?

Accepted Answer

A. @#IMG-DLM&
B. The

Ages of Workers: The ages (in years) of three groups of workers are shown below: -Compute and compare the ranges for the three groups.

Which measure of central location can be used for both interval and nominal variables?

Compute the range and coefficient of variation.

In a histogram, the proportion of the total area which must be to the left of the median is:

How often can we expect between 49 and 61 containers to be sold in a day? (Give a percentage.)

The interquartile range is an interval of numbers starting at Q₁ and ending at Q₃.

Weights of Police Officers: The following data represent the weights in pounds of a sample of 25 police officers: 164, 148, 137, 157, 173, 156, 177, 172, 169, 165, 145, 168, 163, 162, 174, 152, 156, 168, 154, 151, 174, 146, 134, 140, and 171. -Calculate the 3^rd and 7^th deciles of the data.

The coefficient of variation is a measure of variability.

Quartiles divide the observations in a data set into four parts with the same amount of data in each part.

Any points that lie outside the whiskers on a box plot are called ____________________.

Strip Mall Rent: Monthly rent data in dollars for a sample of 10 stores in a small town in South Dakota are as follows: 220, 216, 220, 205, 210, 240, 195, 235, 204, and 250. -Compute the sample median.

The mean of a sample of 15 measurements is 35.6 feet. Suppose that the sample is enlarged to 16 measurements, by including one additional measurement having a value of 42 feet. Find the mean of the sample of the 16 measurements.

The line drawn within the box of a box plot always represents the median.

Hours of Playing Video Games: Suppose that the following data provide the hours of playing video games per week for a sample of 15 high school students in Roanoke, Virginia: 5, 11, 25, 19, 18, 20, 27, 13, 8, 10, 15, 19, 18, 9, and 12. -Determine the location and value of the third quartile.

Lily has been keeping track of what she spends to eat out. The last week's expenditures for meals eaten out were $5.69, $5.95, $6.19, $10.91, $7.49, $14.53, and $7.66. The mean amount Lily spends on meals is $8.35.

Which of the following statements is true for the following observations: 9, 8, 7, 9, 6, 11, and 13?

If the first and second quartiles are farther apart than the second and third quartiles, the shape of the histogram based on the quartiles is ____________________.

What Is Statistics

Graphical and Tabular Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations, Part 1

Inference About Comparing Two Populations, Part 2

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Review of Statistical Inference

Filters

Exam 3: Numerical Descriptive Techniques

Ages of Workers: The ages (in years) of three groups of workers are shown below: -Compute and compare the ranges for the three groups.

Which measure of central location can be used for both interval and nominal variables?

Compute the range and coefficient of variation.

In a histogram, the proportion of the total area which must be to the left of the median is:

How often can we expect between 49 and 61 containers to be sold in a day? (Give a percentage.)

The interquartile range is an interval of numbers starting at Q1 and ending at Q3.

Weights of Police Officers: The following data represent the weights in pounds of a sample of 25 police officers: 164, 148, 137, 157, 173, 156, 177, 172, 169, 165, 145, 168, 163, 162, 174, 152, 156, 168, 154, 151, 174, 146, 134, 140, and 171. -Calculate the 3rd and 7th deciles of the data.

The coefficient of variation is a measure of variability.

Quartiles divide the observations in a data set into four parts with the same amount of data in each part.

Any points that lie outside the whiskers on a box plot are called ____________________.

Strip Mall Rent: Monthly rent data in dollars for a sample of 10 stores in a small town in South Dakota are as follows: 220, 216, 220, 205, 210, 240, 195, 235, 204, and 250. -Compute the sample median.

The mean of a sample of 15 measurements is 35.6 feet. Suppose that the sample is enlarged to 16 measurements, by including one additional measurement having a value of 42 feet. Find the mean of the sample of the 16 measurements.

The line drawn within the box of a box plot always represents the median.

Hours of Playing Video Games: Suppose that the following data provide the hours of playing video games per week for a sample of 15 high school students in Roanoke, Virginia: 5, 11, 25, 19, 18, 20, 27, 13, 8, 10, 15, 19, 18, 9, and 12. -Determine the location and value of the third quartile.

Lily has been keeping track of what she spends to eat out. The last week's expenditures for meals eaten out were $5.69, $5.95, $6.19, $10.91, $7.49, $14.53, and $7.66. The mean amount Lily spends on meals is $8.35.

Which of the following statements is true for the following observations: 9, 8, 7, 9, 6, 11, and 13?

If the first and second quartiles are farther apart than the second and third quartiles, the shape of the histogram based on the quartiles is ____________________.

What Is Statistics

Graphical and Tabular Descriptive Techniques

Data Collection and Sampling

Probability

Random Variables and Discrete Probability Distributions

Continuous Probability Distributions

Sampling Distributions

Introduction to Estimation

Introduction to Hypothesis Testing

Inference About a Population

Inference About Comparing Two Populations, Part 1

Inference About Comparing Two Populations, Part 2

Analysis of Variance

Chi-Squared Tests

Simple Linear Regression and Correlation

Multiple Regression

Review of Statistical Inference

Filters

The interquartile range is an interval of numbers starting at Q₁ and ending at Q₃.

Weights of Police Officers: The following data represent the weights in pounds of a sample of 25 police officers: 164, 148, 137, 157, 173, 156, 177, 172, 169, 165, 145, 168, 163, 162, 174, 152, 156, 168, 154, 151, 174, 146, 134, 140, and 171. -Calculate the 3^rd and 7^th deciles of the data.