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 C

Question 2

For any data set,Chebyshev's Theorem estimates the proportion of observations that occurs within k standard deviations of the mean,where k is greater than 1.0.

Accepted Answer

A) True 
 B)False  True

Question 3

In a negatively skewed distribution,the mean is greater than the median.

Accepted Answer

A) True 
 B)False  False

Question 4

The variance is the mean of the sum of the squared deviations between each observation and the median.

Accepted Answer

A) True 
 B)False

Question 5

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 6

The ages of all the patients in the isolation ward of the hospital are 38,26,13,41 and 22.What is the population variance?

Accepted Answer

A) 106.8 
B) 91.4 
C) 240.3 
D) 42.4 
A) 106.8 
B) 91.4 
C) 240.3 
D) 42.4

Question 7

A statistic computed by summing all of the values of a distribution and dividing by the number of values is called _____________.

Accepted Answer

The answer of A statistic computed by summing all of...

Question 8

For a set of data arranged or sorted in numerical order,the value of the observation in the center is called the weighted mean.

Accepted Answer

A) True 
 B)False

Question 9

The number of work stoppages in a highly industrialized region for selected months are: 6,0,10,14,8 and 0.What is the median number of stoppages?

Accepted Answer

A) 0 
B) 6 
C) 7 
D) 8 
E) 3 
A) 0 
B) 6 
C) 7 
D) 8 
E) 3

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

When reporting descriptive statistics for a variable,why should the report include measures of location and dispersion?

Accepted Answer

The key is to know that every variable h

Question 12

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 13

On a survey questionnaire,students were asked to indicate their class rank in college.If there were only four choices from which to choose,which measure(s)of central location would be appropriate to use 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 14

If a variable is measured at the interval or ratio level,all the values are included when computing the mean.

Accepted Answer

A) True 
 B)False

Question 15

For salaries of $102,000,$98,000,$45,000,$106,000 and $101,000,the arithmetic mean would be an appropriate average.

Accepted Answer

A) True 
 B)False

Question 16

A parameter is a measurable characteristic of a sample.

Accepted Answer

A) True 
 B)False

Question 17

A sample of the personnel files of eight male employees revealed that,during a six-month period,they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2.What is the mean deviation (in days)?

Accepted Answer

A) 1 
B) 0 
C) 3 1/8 
D) 2 3/8 
A) 1 
B) 0 
C) 3 1/8 
D) 2 3/8

Question 18

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

Accepted Answer

A) True 
 B)False

Question 19

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

Accepted Answer

A) Based on only two observations 
B) Can be distorted by a large mean 
C) Not in the same units as the original data 
D) Has no disadvantage 
A) Based on only two observations 
B) Can be distorted by a large mean 
C) Not in the same units as the original data 
D) Has no disadvantage

Question 20

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

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?

For any data set,Chebyshev's Theorem estimates the proportion of observations that occurs within k standard deviations of the mean,where k is greater than 1.0.

In a negatively skewed distribution,the mean is greater than the median.

The variance is the mean of the sum of the squared deviations between each observation and the median.

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

The ages of all the patients in the isolation ward of the hospital are 38,26,13,41 and 22.What is the population variance?

A statistic computed by summing all of the values of a distribution and dividing by the number of values is called _____________.

For a set of data arranged or sorted in numerical order,the value of the observation in the center is called the weighted mean.

The number of work stoppages in a highly industrialized region for selected months are: 6,0,10,14,8 and 0.What is the median number of stoppages?

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?

When reporting descriptive statistics for a variable,why should the report include measures of location and dispersion?

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?

On a survey questionnaire,students were asked to indicate their class rank in college.If there were only four choices from which to choose,which measure(s)of central location would be appropriate to use for the data generated by that questionnaire item?

If a variable is measured at the interval or ratio level,all the values are included when computing the mean.

For salaries of $102,000,$98,000,$45,000,$106,000 and $101,000,the arithmetic mean would be an appropriate average.

A parameter is a measurable characteristic of a sample.

A sample of the personnel files of eight male employees revealed that,during a six-month period,they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2.What is the mean deviation (in days)?

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

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

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?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

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

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

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?

For any data set,Chebyshev's Theorem estimates the proportion of observations that occurs within k standard deviations of the mean,where k is greater than 1.0.

In a negatively skewed distribution,the mean is greater than the median.

The variance is the mean of the sum of the squared deviations between each observation and the median.

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

The ages of all the patients in the isolation ward of the hospital are 38,26,13,41 and 22.What is the population variance?

A statistic computed by summing all of the values of a distribution and dividing by the number of values is called _____________.

For a set of data arranged or sorted in numerical order,the value of the observation in the center is called the weighted mean.

The number of work stoppages in a highly industrialized region for selected months are: 6,0,10,14,8 and 0.What is the median number of stoppages?

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?

When reporting descriptive statistics for a variable,why should the report include measures of location and dispersion?

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?

On a survey questionnaire,students were asked to indicate their class rank in college.If there were only four choices from which to choose,which measure(s)of central location would be appropriate to use for the data generated by that questionnaire item?

If a variable is measured at the interval or ratio level,all the values are included when computing the mean.

For salaries of $102,000,$98,000,$45,000,$106,000 and $101,000,the arithmetic mean would be an appropriate average.

A parameter is a measurable characteristic of a sample.

A sample of the personnel files of eight male employees revealed that,during a six-month period,they lost the following number of days due to illness: 2,0,6,3,10,4,1 and 2.What is the mean deviation (in days)?

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

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

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?

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

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

Linear Regression and Correlation

Multiple Regression and Correlation Analysis

Chi-Square Applications

Filters