Question 1

The sample variance of hourly wages was 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 2

In a company,the standard deviation of the ages of female employees is 6 years and the standard deviation of the ages of male employees is 10 years. These statistics indicate that the dispersion of age is greater for females than for males.

Accepted Answer

A) True 
 B)False

Question 3

A bottling company offers three kinds of delivery service: instant,same day,and within five days. The profit per delivery varies according to the kind of delivery. The profit for an instant delivery is less than the other kinds because the driver has to go directly to a grocery store with a small load and return to the bottling plant. To find out what effect each type of delivery has on the profit picture,the company summarized the data in the following table based on deliveries for the previous quarter.   What is the weighted mean profit per delivery?

Accepted Answer

A) $72 
B) $110 
C) $142 
D) $97 
A) $72 
B) $110 
C) $142 
D) $97

Question 4

The standard deviation is the positive square root of the variance.

Accepted Answer

A) True 
 B)False

Question 5

A sample of the paramedical fees charged by clinics revealed these amounts: $55,$49,$50,$45,$52,and $55. What is the median charge?

Accepted Answer

A) $47.50 
B) $51.00 
C) $52.00 
D) $55.00 
A) $47.50 
B) $51.00 
C) $52.00 
D) $55.00

Question 6

Which measures of central location are not affected by extremely small or extremely large values?

Accepted Answer

A) Mean and median 
B) Mean and mode 
C) Mode and median 
D) Standard deviation and mean 
A) Mean and median 
B) Mean and mode 
C) Mode and median 
D) Standard deviation and mean

Question 7

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

Accepted Answer

A) True 
 B)False

Question 8

According to Chebyshev's theorem,at least what percent of the observations lie within plus and minus 1.75 standard deviations of the mean?

Accepted Answer

A) 56% 
B) 95% 
C) 67% 
D) 100% 
A) 56% 
B) 95% 
C) 67% 
D) 100%

Question 9

In the calculation of the arithmetic mean for grouped data,which value is used to represent all the values in a particular class?

Accepted Answer

A) The upper limit of the class 
B) The lower limit of the class 
C) The frequency of the class 
D) The cumulative frequency preceding the class 
E) The class midpoint 
A) The upper limit of the class 
B) The lower limit of the class 
C) The frequency of the class 
D) The cumulative frequency preceding the class 
E) The class midpoint

Question 10

A sample of single persons receiving Social Security payments revealed these monthly benefits: $826,$699,$1,087,$880,$839,and $965. How many observations are below the median?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 3.5 
A) 1 
B) 2 
C) 3 
D) 3.5

Question 11

Which measure of central location is used to determine an average annual percent increase?

Accepted Answer

A) Arithmetic mean 
B) Weighted mean 
C) Mode 
D) Geometric mean 
A) Arithmetic mean 
B) Weighted mean 
C) Mode 
D) Geometric mean

The sample variance of hourly wages was 10. What is the sample standard deviation?

In a company,the standard deviation of the ages of female employees is 6 years and the standard deviation of the ages of male employees is 10 years. These statistics indicate that the dispersion of age is greater for females than for males.

The standard deviation is the positive square root of the variance.

A sample of the paramedical fees charged by clinics revealed these amounts: $55,$49,$50,$45,$52,and $55. What is the median charge?

Which measures of central location are not affected by extremely small or extremely large values?

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

According to Chebyshev's theorem,at least what percent of the observations lie within plus and minus 1.75 standard deviations of the mean?

In the calculation of the arithmetic mean for grouped data,which value is used to represent all the values in a particular class?

A sample of single persons receiving Social Security payments revealed these monthly benefits: $826,$699,$1,087,$880,$839,and $965. How many observations are below the median?

Which measure of central location is used to determine an average 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

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

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Exam 3: Describing Data: Numerical Measures

The sample variance of hourly wages was 10. What is the sample standard deviation?

In a company,the standard deviation of the ages of female employees is 6 years and the standard deviation of the ages of male employees is 10 years. These statistics indicate that the dispersion of age is greater for females than for males.

The standard deviation is the positive square root of the variance.

A sample of the paramedical fees charged by clinics revealed these amounts: $55,$49,$50,$45,$52,and $55. What is the median charge?

Which measures of central location are not affected by extremely small or extremely large values?

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

According to Chebyshev's theorem,at least what percent of the observations lie within plus and minus 1.75 standard deviations of the mean?

In the calculation of the arithmetic mean for grouped data,which value is used to represent all the values in a particular class?

A sample of single persons receiving Social Security payments revealed these monthly benefits: $826,$699,$1,087,$880,$839,and $965. How many observations are below the median?

Which measure of central location is used to determine an average 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

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