Question 1

For a distribution,the 2nd quartile,the 5th decile,and the 50th percentile,are the same as the median.

Accepted Answer

A) True 
 B)False  True

Question 2

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17,median of 12 and standard deviation of 6?

Accepted Answer

A) +2.5 
B) -2.5 
C) +0.83 
D) -0.83 
A) +2.5 
B) -2.5 
C) +0.83 
D) -0.83 A

Question 3

A scatter diagram is an easy way to represent the relationship between two variables.

Accepted Answer

A) True 
 B)False  True

Question 4

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours.   What is the first quartile for the distribution of number of sales per hour? ________________

Accepted Answer

Q1 = 4 sal

Question 5

A dot plot is useful for showing the range of the data.

Accepted Answer

A) True 
 B)False

Question 6

If Pearson's coefficient of skewness is equal to 0,then the mean and median are equal.

Accepted Answer

A) True 
 B)False

Question 7

The coefficient of skewness is a measure of ____________.

Accepted Answer

The answer of The coefficient of skewness is a measure...

Question 8

An outlier is a value in a data set that is inconsistent with the rest of the data.

Accepted Answer

A) True 
 B)False

Question 9

A relationship between two nominal variables is summarized by a contingency table.

Accepted Answer

A) True 
 B)False

Question 10

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours.   What is the third quartile for the distribution of number of sales per hour? _____________

Accepted Answer

Q3 = 6.5 s

Question 11

In a box plot,if a value is more than 1.5 times the interquartile range from the first or third quartile,the value is an outlier.

Accepted Answer

A) True 
 B)False

Question 12

A percentile can be a decile,but a decile cannot be a quartile.

Accepted Answer

A) True 
 B)False

Question 13

Quartiles divide a distribution into ten equal parts.

Accepted Answer

A) True 
 B)False

Question 14

Given the sample information in the following table regarding public opinion on gun control,who is more likely to favor gun control?

Accepted Answer

Republicans are more likely to

Question 15

What is the common purpose of a scatter diagram and a contingency table?

Accepted Answer

Both are u

Question 16

A study of the net sales of a sample of small corporations revealed that the mean net sales is $2.1 million,the median $2.4 million,the modal sales $2.6 million and the standard deviation of the distribution is $500,000.What is the Pearson's coefficient of skewness?

Accepted Answer

A) -9.1 
B) +6.3 
C) -3.9 
D) +2.4 
E) None of the above 
A) -9.1 
B) +6.3 
C) -3.9 
D) +2.4 
E) None of the above

Question 17

If the mean of a distribution is smaller than the median and mode,what is the sign of Pearson's coefficient of skewness? _______________

Accepted Answer

The answer of If the mean of a distribution is...

Question 18

If Pearson's coefficient of skewness is negative,then the distribution is skewed to the left.

Accepted Answer

A) True 
 B)False

Question 19

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours.   What is the median for the distribution of number of sales per hour? ____________

Accepted Answer

Median = 5

Question 20

Quartiles are another way to describe the central location of a distribution.

Accepted Answer

A) True 
 B)False

For a distribution,the 2^nd quartile,the 5^th decile,and the 50^th percentile,are the same as the median.

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17,median of 12 and standard deviation of 6?

A scatter diagram is an easy way to represent the relationship between two variables.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the first quartile for the distribution of number of sales per hour? ________________

A dot plot is useful for showing the range of the data.

If Pearson's coefficient of skewness is equal to 0,then the mean and median are equal.

The coefficient of skewness is a measure of ____________.

An outlier is a value in a data set that is inconsistent with the rest of the data.

A relationship between two nominal variables is summarized by a contingency table.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the third quartile for the distribution of number of sales per hour? _____________

In a box plot,if a value is more than 1.5 times the interquartile range from the first or third quartile,the value is an outlier.

A percentile can be a decile,but a decile cannot be a quartile.

Quartiles divide a distribution into ten equal parts.

Given the sample information in the following table regarding public opinion on gun control,who is more likely to favor gun control?

What is the common purpose of a scatter diagram and a contingency table?

A study of the net sales of a sample of small corporations revealed that the mean net sales is $2.1 million,the median $2.4 million,the modal sales $2.6 million and the standard deviation of the distribution is $500,000.What is the Pearson's coefficient of skewness?

If the mean of a distribution is smaller than the median and mode,what is the sign of Pearson's coefficient of skewness? _______________

If Pearson's coefficient of skewness is negative,then the distribution is skewed to the left.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the median for the distribution of number of sales per hour? ____________

Quartiles are another way to describe the central location of a distribution.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

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 4: Describing Data: Displaying and Exploring Data

For a distribution,the 2nd quartile,the 5th decile,and the 50th percentile,are the same as the median.

What is the value of the Pearson coefficient of skewness for a distribution with a mean of 17,median of 12 and standard deviation of 6?

A scatter diagram is an easy way to represent the relationship between two variables.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the first quartile for the distribution of number of sales per hour? ________________

A dot plot is useful for showing the range of the data.

If Pearson's coefficient of skewness is equal to 0,then the mean and median are equal.

The coefficient of skewness is a measure of ____________.

An outlier is a value in a data set that is inconsistent with the rest of the data.

A relationship between two nominal variables is summarized by a contingency table.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the third quartile for the distribution of number of sales per hour? _____________

In a box plot,if a value is more than 1.5 times the interquartile range from the first or third quartile,the value is an outlier.

A percentile can be a decile,but a decile cannot be a quartile.

Quartiles divide a distribution into ten equal parts.

Given the sample information in the following table regarding public opinion on gun control,who is more likely to favor gun control?

What is the common purpose of a scatter diagram and a contingency table?

A study of the net sales of a sample of small corporations revealed that the mean net sales is $2.1 million,the median $2.4 million,the modal sales $2.6 million and the standard deviation of the distribution is $500,000.What is the Pearson's coefficient of skewness?

If the mean of a distribution is smaller than the median and mode,what is the sign of Pearson's coefficient of skewness? _______________

If Pearson's coefficient of skewness is negative,then the distribution is skewed to the left.

A telemarketing firm is monitoring the performance of its employees based on the number of sales per hour.One employee had the following sales for the last 20 hours. What is the median for the distribution of number of sales per hour? ____________

Quartiles are another way to describe the central location of a distribution.

What Is Statistics

Describing Data: Frequency Distributions and Graphic Presentations

Describing Data: Numerical Measures

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

For a distribution,the 2^nd quartile,the 5^th decile,and the 50^th percentile,are the same as the median.