Question 1

The closing prices of a common stock have been 61.5, 62, 61.25, 60.875 and 61.5 for the past week. What is the range?

Accepted Answer

A)  $1.250 
B)  $1.750 
C)  $1.125 
D)  $1.875 
A)  $1.250 
B)  $1.750 
C)  $1.125 
D)  $1.875

Question 2

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 3

When is the only time the variance equals the standard deviation? ________________

Accepted Answer

The answer of When is the only time the variance...

Question 4

When computing the mean for grouped data, the numerator is the sum of _________.

Accepted Answer

the produc

Question 5

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

Accepted Answer

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

Question 6

Cook County public safety monitors the number of "driving on the influence" arrests and is interested in the distribution of arrests in the month of December over the last 5 years. The data are   What is the standard deviation? ___________.

Accepted Answer

The answer of Cook County public safety monitors the number...

Question 7

If the sample variance for a frequency distribution consisting of hourly wages was computed to be 10, what is the sample standard deviation?

Accepted Answer

A)  $1.96 
B)  $4.67 
C)  $3.16 
D)  $10.00 
A)  $1.96 
B)  $4.67 
C)  $3.16 
D)  $10.00

Question 8

For any data set, which measures of central location have only one value?

Accepted Answer

A)  Mode and median 
B)  Mode and mean 
C)  Mode and standard deviation 
D)  Mean and median 
A)  Mode and median 
B)  Mode and mean 
C)  Mode and standard deviation 
D)  Mean and median

Question 9

In a company, the standard deviation of the ages of female employees is six years and the standard deviation of the ages of male employees is ten years. These statistics indicate that the dispersion of age is greater for females than for males.

Accepted Answer

A) True 
 B)False

Question 10

A sample of the monthly amounts spent for food by families of four receiving food stamps approximates a symmetrical distribution. The sample mean is $150 and the standard deviation is $20. Using the Empirical Rule, about 95 percent 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

Question 11

The Sea Mist Hotel collects customer satisfaction data daily. Yesterday the hotel was 99% occupied and the manager wanted to quickly assess customer satisfaction. She randomly selected ten scores. 100 points is the maximum score. The mean score is 82.1. The ten scores were   What is the standard deviation? ___________.

Accepted Answer

The answer of The Sea Mist Hotel collects customer satisfaction...

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 table below.   What is the median price of Unleaded gas? _______.

Accepted Answer

The answer of A sample of five full service gasoline...

Question 13

What is a unique characteristic of the mean deviation?

Accepted Answer

A)  It is based on only two observations. 
B)  It is based on deviations from the mean. 
C)  It uses absolute values. 
D)  It is only applied to skewed distributions. 
A)  It is based on only two observations. 
B)  It is based on deviations from the mean. 
C)  It uses absolute values. 
D)  It is only applied to skewed distributions.

Question 14

What is the relationship between the variance and the standard deviation?

Accepted Answer

A)  Variance is the square root of the standard deviation 
B)  Variance is the square of the standard deviation 
C)  Variance is twice the standard deviation 
D)  No constant relationship between the variance and the standard deviation 
A)  Variance is the square root of the standard deviation 
B)  Variance is the square of the standard deviation 
C)  Variance is twice the standard deviation 
D)  No constant relationship between the variance and the standard deviation

Question 15

A company studied the commissions paid to furniture salespersons. If the variance is computed, what is the unit of measure? ___________

Accepted Answer

The answer of A company studied the commissions paid to...

Question 16

A stockbroker placed the following order for a customer: 
*50 shares of Kaiser Aluminum preferred at $104 a share
* 100 shares of GTE preferred at $25.25 a share
* 20 shares of Boston Edison preferred 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 17

The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68 percent of the outside diameters lie between what two amounts?

Accepted Answer

A)  13.5 and 14.5 inches 
B)  13.0 and 15.0 inches 
C)  13.9 and 14.1 inches 
D)  13.8 and 14.2 inches 
A)  13.5 and 14.5 inches 
B)  13.0 and 15.0 inches 
C)  13.9 and 14.1 inches 
D)  13.8 and 14.2 inches

Question 18

The sum of the differences between sample observations and the sample mean is

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 19

The U.S. Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1986 to $5,100 million in 2009. What is the geometric mean annual percent increase in international passenger revenues?

Accepted Answer

A)  10.4 
B)  27.9 
C)  103.6 
D)  9.96 
E)  2814 
A)  10.4 
B)  27.9 
C)  103.6 
D)  9.96 
E)  2814

Question 20

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

The closing prices of a common stock have been 61.5, 62, 61.25, 60.875 and 61.5 for the past week. What is the range?

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

When is the only time the variance equals the standard deviation? ________________

When computing the mean for grouped data, the numerator is the sum of _________.

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

Cook County public safety monitors the number of "driving on the influence" arrests and is interested in the distribution of arrests in the month of December over the last 5 years. The data are What is the standard deviation? ___________.

If the sample variance for a frequency distribution consisting of hourly wages was computed to be 10, what is the sample standard deviation?

For any data set, which measures of central location have only one value?

In a company, the standard deviation of the ages of female employees is six years and the standard deviation of the ages of male employees is ten years. These statistics indicate that the dispersion of age is greater for females than for males.

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

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 table below. What is the median price of Unleaded gas? _______.

What is a unique characteristic of the mean deviation?

What is the relationship between the variance and the standard deviation?

A company studied the commissions paid to furniture salespersons. If the variance is computed, what is the unit of measure? ___________

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

The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68 percent of the outside diameters lie between what two amounts?

The sum of the differences between sample observations and the sample mean is

The U.S. Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1986 to $5,100 million in 2009. What is the geometric mean annual percent increase in international passenger revenues?

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?

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

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

Exam 3: Describing Data: Numerical Measures

The closing prices of a common stock have been 61.5, 62, 61.25, 60.875 and 61.5 for the past week. What is the range?

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

When is the only time the variance equals the standard deviation? ________________

When computing the mean for grouped data, the numerator is the sum of _________.

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

Cook County public safety monitors the number of "driving on the influence" arrests and is interested in the distribution of arrests in the month of December over the last 5 years. The data are What is the standard deviation? ___________.

If the sample variance for a frequency distribution consisting of hourly wages was computed to be 10, what is the sample standard deviation?

For any data set, which measures of central location have only one value?

In a company, the standard deviation of the ages of female employees is six years and the standard deviation of the ages of male employees is ten years. These statistics indicate that the dispersion of age is greater for females than for males.

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

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 table below. What is the median price of Unleaded gas? _______.

What is a unique characteristic of the mean deviation?

What is the relationship between the variance and the standard deviation?

A company studied the commissions paid to furniture salespersons. If the variance is computed, what is the unit of measure? ___________

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

The distribution of a sample of the outside diameters of PVC gas pipes approximates a symmetrical, bell-shaped distribution. The arithmetic mean is 14.0 inches, and the standard deviation is 0.1 inches. About 68 percent of the outside diameters lie between what two amounts?

The sum of the differences between sample observations and the sample mean is

The U.S. Federal Aviation Administration reported that passenger revenues on international flights increased from $528 million in 1986 to $5,100 million in 2009. What is the geometric mean annual percent increase in international passenger revenues?

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?

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

Index Numbers

Time Series and Forecasting

Nonparametric Methods: Goodness-Of-Fit Tests

Nonparametric Methods: Analysis of Ranked Data

Statistical Process Control and Quality Management

An Introduction to Decision Theory

Filters

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