Question 1

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

Question 2

If a distribution is negatively skewed,the distribution is not symmetrical and the long tail is to the left.

Accepted Answer

A) True 
 B)False

Question 3

In a stem-and-leaf display,the leaf represents the members of a class in a frequency distribution.

Accepted Answer

A) True 
 B)False

Question 4

A dot plot is best applied for a data set with ________.

Accepted Answer

A) 1,000 observations 
B) 50 observations 
C) more than one variable 
D) one mode 
A) 1,000 observations 
B) 50 observations 
C) more than one variable 
D) one mode

Question 5

A box plot shows the skewness of a distribution.

Accepted Answer

A) True 
 B)False

Question 6

A dot plot can be used to show ________.

Accepted Answer

A) the mean,median,and mode 
B) the general shape of a distribution for a nominal qualitative variable 
C) the distribution for a quantitative variable 
D) the interquartile range 
A) the mean,median,and mode 
B) the general shape of a distribution for a nominal qualitative variable 
C) the distribution for a quantitative variable 
D) the interquartile range

Question 7

What is the possible range of values for Pearson's coefficient of skewness?

Accepted Answer

A) −1 and +1 
B) −3 and +3 
C) 0% and 100% 
D) Unlimited values 
A) −1 and +1 
B) −3 and +3 
C) 0% and 100% 
D) Unlimited values

Question 8

What statistics are needed to draw a box plot?

Accepted Answer

A) The minimum,maximum,median,first and third quartiles 
B) The median,mean,and standard deviation 
C) The median and interquartile range 
D) The mean and standard deviation 
A) The minimum,maximum,median,first and third quartiles 
B) The median,mean,and standard deviation 
C) The median and interquartile range 
D) The mean and standard deviation

Question 9

A sample of experienced typists revealed that their mean typing speed is 87 words per minute and the median typing speed is 73 words per minute. The standard deviation of typing speed is 16.9 words per minute. What is the Pearson coefficient of skewness?

Accepted Answer

A) −2.5 
B) −4.2 
C) +4.2 
D) +2.5 
A) −2.5 
B) −4.2 
C) +4.2 
D) +2.5

Question 10

The following graph illustrates ________.

Accepted Answer

A) a positive or direct relationship 
B) a negative or inverse relationship 
C) no relationship 
D) a distribution for a single variable 
A) a positive or direct relationship 
B) a negative or inverse relationship 
C) no relationship 
D) a distribution for a single variable

Question 11

Which of the following is NOT a measure of dispersion?

Accepted Answer

A) The interquartile range 
B) The standard deviation 
C) The 50th percentile 
D) The range 
A) The interquartile range 
B) The standard deviation 
C) The 50th percentile 
D) The range

Question 12

The following graph is a ________.

Accepted Answer

A) Dot plot 
B) Stem-and-leaf diagram 
C) Box plot 
D) Contingency table 
A) Dot plot 
B) Stem-and-leaf diagram 
C) Box plot 
D) Contingency table

Question 13

The following graph is ________.

Accepted Answer

A) positively skewed 
B) negatively skewed 
C) symmetric 
D) uniformly distributed 
A) positively skewed 
B) negatively skewed 
C) symmetric 
D) uniformly distributed

Question 14

In the following table,

Accepted Answer

A) there are 16 observations. 
B) there are 4 observations in the second class. 
C) there are 10 observations less than 30. 
D) there are 10 observations greater than 30. 
A) there are 16 observations. 
B) there are 4 observations in the second class. 
C) there are 10 observations less than 30. 
D) there are 10 observations greater than 30.

Question 15

The median of a sample will always equal the ________.

Accepted Answer

A) mode 
B) mean 
C) 50th percentile 
D) All of these answers are correct. 
A) mode 
B) mean 
C) 50th percentile 
D) All of these answers are correct.

Question 16

A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

Accepted Answer

A) True 
 B)False

Question 17

The following table is a ________.

Accepted Answer

A) dot plot 
B) stem-and-leaf display 
C) box plot 
D) contingency table 
A) dot plot 
B) stem-and-leaf display 
C) box plot 
D) contingency table

Question 18

A dot plot is useful for showing individual observations.

Accepted Answer

A) True 
 B)False

Question 19

The 50th percentile of a distribution is the same as the distribution mean.

Accepted Answer

A) True 
 B)False

Question 20

Pearson's coefficient of skewness is a measure of a distribution's symmetry.

Accepted Answer

A) True 
 B)False

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

If a distribution is negatively skewed,the distribution is not symmetrical and the long tail is to the left.

In a stem-and-leaf display,the leaf represents the members of a class in a frequency distribution.

A dot plot is best applied for a data set with ________.

A box plot shows the skewness of a distribution.

A dot plot can be used to show ________.

What is the possible range of values for Pearson's coefficient of skewness?

What statistics are needed to draw a box plot?

A sample of experienced typists revealed that their mean typing speed is 87 words per minute and the median typing speed is 73 words per minute. The standard deviation of typing speed is 16.9 words per minute. What is the Pearson coefficient of skewness?

The following graph illustrates ________.

Which of the following is NOT a measure of dispersion?

The following graph is a ________.

The following graph is ________.

In the following table,

The median of a sample will always equal the ________.

A student scored in the 85^th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

The following table is a ________.

A dot plot is useful for showing individual observations.

The 50th percentile of a distribution is the same as the distribution mean.

Pearson's coefficient of skewness is a measure of a distribution's symmetry.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

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

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 4: Describing Data: Displaying and Exploring Data

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

If a distribution is negatively skewed,the distribution is not symmetrical and the long tail is to the left.

In a stem-and-leaf display,the leaf represents the members of a class in a frequency distribution.

A dot plot is best applied for a data set with ________.

A box plot shows the skewness of a distribution.

A dot plot can be used to show ________.

What is the possible range of values for Pearson's coefficient of skewness?

What statistics are needed to draw a box plot?

A sample of experienced typists revealed that their mean typing speed is 87 words per minute and the median typing speed is 73 words per minute. The standard deviation of typing speed is 16.9 words per minute. What is the Pearson coefficient of skewness?

The following graph illustrates ________.

Which of the following is NOT a measure of dispersion?

The following graph is a ________.

The following graph is ________.

In the following table,

The median of a sample will always equal the ________.

A student scored in the 85th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.

The following table is a ________.

A dot plot is useful for showing individual observations.

The 50th percentile of a distribution is the same as the distribution mean.

Pearson's coefficient of skewness is a measure of a distribution's symmetry.

What Is Statistics

Describing Data: Frequency Tables, Frequency Distributions, and Graphic Presentation

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

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

A student scored in the 85^th percentile on a standardized test. This means that the student scored lower than 85% of all students who took the test.