Question 1

For any distribution, there are an equal number of values above and below the mean.

Accepted Answer

A) True 
 B)False

Question 2

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table.   What is the median price of super unleaded gas?

Accepted Answer

$2.50
Explanation: There are f

Question 3

The arithmetic mean is the sum of the quantitative observations divided by the total number of observations.

Accepted Answer

A) True 
 B)False

Question 4

The mean, as a measure of central location, would be inappropriate for which one of the following?

Accepted Answer

A)  Ages of adults at a senior citizen center 
B)  Incomes of lawyers 
C)  Number of pages in textbooks on statistics 
D)  Marital status of college students at a particular university 
A)  Ages of adults at a senior citizen center 
B)  Incomes of lawyers 
C)  Number of pages in textbooks on statistics 
D)  Marital status of college students at a particular university

Question 5

Five students were given a page of problems with instructions to solve as many as they could in one hour. The five students solved the following number of problems: 12, 10, 8, 6, and 4. What is the arithmetic mean number of minutes required per problem?

Accepted Answer

7.5 minutes (average of eight problems i

Question 6

The Canal Corporation recorded the last five annual percent changes in profit.   What is the mean annual percentage change over the last five years?

Accepted Answer

The answer of The Canal Corporation recorded the last five...

Question 7

The mean monthly income of a group of college students is $500; the standard deviation is $50. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?

Accepted Answer

96%
Explanation: First find the values o

Question 8

What are the similarities and differences between the mean, the median, and the mode?

Accepted Answer

Answers may vary but should include the

Question 9

In a departmental review of employee performance, three employees were scored a 4 (excellent performance), five employees were scored a 3 (average performance), and one employee was scored a 1 (below average performance). To compute a weighted mean, the weights would be ___________________.

Accepted Answer

3, 5, and

Question 10

Coastal Carolina University recently surveyed a sample of students to determine how far they lived from campus. The results are shown below. Compute the standard deviation.

Accepted Answer

The answer of Coastal Carolina University recently surveyed a sample...

Question 11

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table.   What is the mean price of unleaded plus gas?

Accepted Answer

$2.38
Explanation: To find the

Question 12

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table.   What is the mean price of unleaded gas?

Accepted Answer

$2.27
Explanation: In this cas

Question 13

A set of ordinal-, interval-, or ratio-level data may only have one mode.

Accepted Answer

A) True 
 B)False

Question 14

A disadvantage of using an arithmetic mean to summarize a set of data is that __________.

Accepted Answer

A)  The arithmetic mean sometimes has two values 
B)  It can be used for interval and ratio data 
C)  It is always different from the median 
D)  It can be biased by one or two extremely small or large values 
A)  The arithmetic mean sometimes has two values 
B)  It can be used for interval and ratio data 
C)  It is always different from the median 
D)  It can be biased by one or two extremely small or large values

Question 15

The sum of the deviations of each data value from this measure of central location will always be zero.

Accepted Answer

A)  Mode 
B)  Mean 
C)  Median 
D)  Standard deviation 
A)  Mode 
B)  Mean 
C)  Median 
D)  Standard deviation

Question 16

The same mean:

Accepted Answer

A)  Is always equal to the population mean. 
B)  Is always smaller than the population mean. 
C)  Is found by adding the data values and dividing them by (n-1). 
D)  Is found by adding all data values and dividing them by n. 
A)  Is always equal to the population mean. 
B)  Is always smaller than the population mean. 
C)  Is found by adding the data values and dividing them by (n-1). 
D)  Is found by adding all data values and dividing them by n.

Question 17

If a set of quantitative observations contains an extreme value, the most representative measure of central location would be the __________.

Accepted Answer

The answer of If a set of quantitative observations contains...

Question 18

What is a disadvantage of the range as a measure of dispersion?

Accepted Answer

A)  It is based on only two observations. 
B)  It can be distorted by a large mean. 
C)  It is not in the same units as the original data. 
D)  It has no disadvantage. 
A)  It is based on only two observations. 
B)  It can be distorted by a large mean. 
C)  It is not in the same units as the original data. 
D)  It has no disadvantage.

Question 19

The times (in minutes) that several underwriters took to review applications for similar insurance coverage are 50, 230, 52, and 57. What is the median length of time required to review an application?

Accepted Answer

A)  54.5 
B)  141.0 
C)  97.25 
D)  109.0 
A)  54.5 
B)  141.0 
C)  97.25 
D)  109.0

Question 20

A company's human resources department was interested in the average number of years that a person works before retiring. The sample of size 11 follows:   What is the median?

Accepted Answer

21
Explanation: The median is

For any distribution, there are an equal number of values above and below the mean.

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the median price of super unleaded gas?

The arithmetic mean is the sum of the quantitative observations divided by the total number of observations.

The mean, as a measure of central location, would be inappropriate for which one of the following?

Five students were given a page of problems with instructions to solve as many as they could in one hour. The five students solved the following number of problems: 12, 10, 8, 6, and 4. What is the arithmetic mean number of minutes required per problem?

The Canal Corporation recorded the last five annual percent changes in profit. What is the mean annual percentage change over the last five years?

The mean monthly income of a group of college students is $500; the standard deviation is $50. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?

What are the similarities and differences between the mean, the median, and the mode?

In a departmental review of employee performance, three employees were scored a 4 (excellent performance), five employees were scored a 3 (average performance), and one employee was scored a 1 (below average performance). To compute a weighted mean, the weights would be ___________________.

Coastal Carolina University recently surveyed a sample of students to determine how far they lived from campus. The results are shown below. Compute the standard deviation.

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the mean price of unleaded plus gas?

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the mean price of unleaded gas?

A set of ordinal-, interval-, or ratio-level data may only have one mode.

A disadvantage of using an arithmetic mean to summarize a set of data is that __________.

The sum of the deviations of each data value from this measure of central location will always be zero.

The same mean:

If a set of quantitative observations contains an extreme value, the most representative measure of central location would be the __________.

What is a disadvantage of the range as a measure of dispersion?

The times (in minutes) that several underwriters took to review applications for similar insurance coverage are 50, 230, 52, and 57. What is the median length of time required to review an application?

A company's human resources department was interested in the average number of years that a person works before retiring. The sample of size 11 follows: What is the median?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 3: Describing Data: Numerical Measures

For any distribution, there are an equal number of values above and below the mean.

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the median price of super unleaded gas?

The arithmetic mean is the sum of the quantitative observations divided by the total number of observations.

The mean, as a measure of central location, would be inappropriate for which one of the following?

Five students were given a page of problems with instructions to solve as many as they could in one hour. The five students solved the following number of problems: 12, 10, 8, 6, and 4. What is the arithmetic mean number of minutes required per problem?

The Canal Corporation recorded the last five annual percent changes in profit. What is the mean annual percentage change over the last five years?

The mean monthly income of a group of college students is $500; the standard deviation is $50. According to Chebyshev's theorem, at least what percent of the incomes will lie between $400 and $600?

What are the similarities and differences between the mean, the median, and the mode?

In a departmental review of employee performance, three employees were scored a 4 (excellent performance), five employees were scored a 3 (average performance), and one employee was scored a 1 (below average performance). To compute a weighted mean, the weights would be ___________________.

Coastal Carolina University recently surveyed a sample of students to determine how far they lived from campus. The results are shown below. Compute the standard deviation.

A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the mean price of unleaded plus gas?

A sample of five full service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. What is the mean price of unleaded gas?

A set of ordinal-, interval-, or ratio-level data may only have one mode.

A disadvantage of using an arithmetic mean to summarize a set of data is that __________.

The sum of the deviations of each data value from this measure of central location will always be zero.

The same mean:

If a set of quantitative observations contains an extreme value, the most representative measure of central location would be the __________.

What is a disadvantage of the range as a measure of dispersion?

The times (in minutes) that several underwriters took to review applications for similar insurance coverage are 50, 230, 52, and 57. What is the median length of time required to review an application?

A company's human resources department was interested in the average number of years that a person works before retiring. The sample of size 11 follows: What is the median?

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

Describing Data: Displaying and Exploring Data

A Survey of Probability Concepts

Discrete Probability Distributions

Continuous Probability Distributions

Sampling Methods and the Central Limit Theorem

Estimation and Confidence Intervals

One-Sample Tests of Hypothesis

Two-Sample Tests of Hypothesis

Analysis of Variance

Correlation and Linear Regression

Multiple Regression Analysis

Nonparametric Methods: Nominal Level Hypothesis Tests

Nonparametric Methods: Analysis of Ordinal Data

Index Numbers

Time Series and Forecasting

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters