Question 1

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 B

Question 2

The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical,normal distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical rule,about 95% of the monthly food expenditures are between what two amounts?

Accepted Answer

A) $100 and $200 
B) $85 and $105 
C) $205 and $220 
D) $110 and $190 
A) $100 and $200 
B) $85 and $105 
C) $205 and $220 
D) $110 and $190 D

Question 3

If the variance of the "number of daily parking tickets" issued is 100,the standard deviation is defined as the ________.

Accepted Answer

A) "number of daily parking tickets" 
B) "number of daily parking tickets" squared 
C) absolute value of the variance of the "number of daily parking tickets" 
D) square root of the variance of the "number of daily parking tickets" 
A) "number of daily parking tickets" 
B) "number of daily parking tickets" squared 
C) absolute value of the variance of the "number of daily parking tickets" 
D) square root of the variance of the "number of daily parking tickets" D

Question 4

A value that is typical or representative of the data is referred to as a measure of central location.

Accepted Answer

A) True 
 B)False

Question 5

What is the median of 26,30,24,32,32,31,27,and 29?

Accepted Answer

A) 32 
B) 29 
C) 30 
D) 29.5 
A) 32 
B) 29 
C) 30 
D) 29.5

Question 6

Based on the Empirical rule,what percent of the observations will lie between plus or minus two standard deviations from the mean?

Accepted Answer

A) 95% 
B) 5% 
C) 68% 
D) 2.5% 
A) 95% 
B) 5% 
C) 68% 
D) 2.5%

Question 7

In a sample of 10 people,3 persons earn $8 an hour,6 earn $9 an hour,and 1 earns $12 an hour. The weighted mean hourly wage is $9.

Accepted Answer

A) True 
 B)False

Question 8

What is the lowest level of measurement to which a median can be computed?

Accepted Answer

A) Nominal 
B) Ordinal 
C) Interval 
D) Ratio 
A) Nominal 
B) Ordinal 
C) Interval 
D) Ratio

Question 9

The sum of the differences between sample observations and the sample mean is equal to ________.

Accepted Answer

A) zero 
B) the mean deviation 
C) the range 
D) the standard deviation 
A) zero 
B) the mean deviation 
C) the range 
D) the standard deviation

Question 10

The following are the weekly amounts of welfare payments made by the federal government to a sample of six families: $139,$136,$130,$136,$147,and $136. What is the range?

Accepted Answer

A) $0 
B) $14 
C) $52 
D) $17 
A) $0 
B) $14 
C) $52 
D) $17

Question 11

A survey item asked students to indicate their class in college: freshman,sophomore,junior,or senior. Which measure(s)of central location would be appropriate for the data generated by that questionnaire item?

Accepted Answer

A) Mean and median 
B) Mean and mode 
C) Mode and median 
D) Mode only 
A) Mean and median 
B) Mean and mode 
C) Mode and median 
D) Mode only

Question 12

Production of passenger cars in Japan increased from 3.94 million in 1999 to 6.74 million in 2009. What is the geometric mean annual percent increase?

Accepted Answer

A) 4.0 
B) 1.9 
C) 5.5 
D) 16.6 
E) 47.3 
A) 4.0 
B) 1.9 
C) 5.5 
D) 16.6 
E) 47.3

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

A stockbroker placed the following order for a customer:
• 50 shares of Kaiser Aluminum at $104 a share
• 100 shares of GTE at $25.25 a share
• 20 shares of Boston Edison at $9.125 a share
What is the weighted arithmetic mean price per share?

Accepted Answer

A) $25.25 
B) $79.75 
C) $103.50 
D) $46.51 
A) $25.25 
B) $79.75 
C) $103.50 
D) $46.51

Question 15

A purchasing agent for a trucking company is shopping for replacement tires for their trucks from two suppliers. The suppliers' prices are the same. However,Supplier A's tires have an average life of 60,000 miles with a standard deviation of 10,000 miles. Supplier B's tires have an average life of 60,000 miles with a standard deviation of 2,000 miles. Which of the following statements is true?

Accepted Answer

A) The two distributions of tire life are the same. 
B) On average,Supplier A's tires have a longer life than Supplier B's tires. 
C) The life of Supplier B's tire is more predictable than the life of Supplier A's tires. 
D) The dispersion of Supplier A's tire life is less than the dispersion of Supplier B's tire life. 
A) The two distributions of tire life are the same. 
B) On average,Supplier A's tires have a longer life than Supplier B's tires. 
C) The life of Supplier B's tire is more predictable than the life of Supplier A's tires. 
D) The dispersion of Supplier A's tire life is less than the dispersion of Supplier B's tire life.

Question 16

The sample 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

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

Accepted Answer

A) True 
 B)False

Question 18

The sum of the deviations from the mean for the set of numbers 4,9,and 5 will equal zero.

Accepted Answer

A) True 
 B)False

Question 19

Over the last six months,the following numbers of absences have been reported: 6,0,10,14,8,and 0. What is the median number of monthly absences?

Accepted Answer

A) 6 
B) 7 
C) 8 
D) 3 
A) 6 
B) 7 
C) 8 
D) 3

Question 20

For a sample of similar-sized all-electric homes,the March electric bills were (to the nearest dollar): $212,$191,$176,$129,$106,$92,$108,$109,$103,$121,$175,and $194. What is the range?

Accepted Answer

A) $100 
B) $130 
C) $120 
D) $112 
A) $100 
B) $130 
C) $120 
D) $112

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

The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical,normal distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical rule,about 95% of the monthly food expenditures are between what two amounts?

If the variance of the "number of daily parking tickets" issued is 100,the standard deviation is defined as the ________.

A value that is typical or representative of the data is referred to as a measure of central location.

What is the median of 26,30,24,32,32,31,27,and 29?

Based on the Empirical rule,what percent of the observations will lie between plus or minus two standard deviations from the mean?

In a sample of 10 people,3 persons earn $8 an hour,6 earn $9 an hour,and 1 earns $12 an hour. The weighted mean hourly wage is $9.

What is the lowest level of measurement to which a median can be computed?

The sum of the differences between sample observations and the sample mean is equal to ________.

The following are the weekly amounts of welfare payments made by the federal government to a sample of six families: $139,$136,$130,$136,$147,and $136. What is the range?

A survey item asked students to indicate their class in college: freshman,sophomore,junior,or senior. Which measure(s)of central location would be appropriate for the data generated by that questionnaire item?

Production of passenger cars in Japan increased from 3.94 million in 1999 to 6.74 million in 2009. What is the geometric mean annual percent increase?

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

A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum at $104 a share • 100 shares of GTE at $25.25 a share • 20 shares of Boston Edison at $9.125 a share What is the weighted arithmetic mean price per share?

The sample mean

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

The sum of the deviations from the mean for the set of numbers 4,9,and 5 will equal zero.

Over the last six months,the following numbers of absences have been reported: 6,0,10,14,8,and 0. What is the median number of monthly absences?

For a sample of similar-sized all-electric homes,the March electric bills were (to the nearest dollar): $212,$191,$176,$129,$106,$92,$108,$109,$103,$121,$175,and $194. What is the range?

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

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

The monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical,normal distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical rule,about 95% of the monthly food expenditures are between what two amounts?

If the variance of the "number of daily parking tickets" issued is 100,the standard deviation is defined as the ________.

A value that is typical or representative of the data is referred to as a measure of central location.

What is the median of 26,30,24,32,32,31,27,and 29?

Based on the Empirical rule,what percent of the observations will lie between plus or minus two standard deviations from the mean?

In a sample of 10 people,3 persons earn $8 an hour,6 earn $9 an hour,and 1 earns $12 an hour. The weighted mean hourly wage is $9.

What is the lowest level of measurement to which a median can be computed?

The sum of the differences between sample observations and the sample mean is equal to ________.

The following are the weekly amounts of welfare payments made by the federal government to a sample of six families: $139,$136,$130,$136,$147,and $136. What is the range?

A survey item asked students to indicate their class in college: freshman,sophomore,junior,or senior. Which measure(s)of central location would be appropriate for the data generated by that questionnaire item?

Production of passenger cars in Japan increased from 3.94 million in 1999 to 6.74 million in 2009. What is the geometric mean annual percent increase?

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

A stockbroker placed the following order for a customer: • 50 shares of Kaiser Aluminum at $104 a share • 100 shares of GTE at $25.25 a share • 20 shares of Boston Edison at $9.125 a share What is the weighted arithmetic mean price per share?

The sample mean

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

The sum of the deviations from the mean for the set of numbers 4,9,and 5 will equal zero.

Over the last six months,the following numbers of absences have been reported: 6,0,10,14,8,and 0. What is the median number of monthly absences?

For a sample of similar-sized all-electric homes,the March electric bills were (to the nearest dollar): $212,$191,$176,$129,$106,$92,$108,$109,$103,$121,$175,and $194. What is the range?

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