Question 1

If the mean of a distribution is smaller than the median and mode, the sign of Pearson's coefficient of skewness is ______________.

Accepted Answer

negative

Question 2

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 19 hours.   What is the third quartile for the distribution of number of sales per hour?

Accepted Answer

Q3 = 7 sales per hour Explanation: Sort the data from minimum to maximum values. There are 19 values, so the third quartile is at the (19 + 1)(3/4) = 15^th value in the ranked set of values, or 7.

Question 3

Percentiles divide a distribution into _____________.

Accepted Answer

A)  2 equal parts 
B)  4 equal parts 
C)  10 equal parts 
D)  100 equal parts 
A)  2 equal parts 
B)  4 equal parts 
C)  10 equal parts 
D)  100 equal parts D

Question 4

Draw a negatively or positively skewed distribution and show the relative locations of the mean, median, and mode.

Accepted Answer

See the text for ill

Question 5

To locate the percentile for a given observation in a data set, the data must be ___________.

Accepted Answer

A)  Sorted and listed from the minimum to the maximum values 
B)  Displayed in a histogram 
C)  Summarized in a frequency distribution 
D)  Distributed symmetrically around the mean 
A)  Sorted and listed from the minimum to the maximum values 
B)  Displayed in a histogram 
C)  Summarized in a frequency distribution 
D)  Distributed symmetrically around the mean

Question 6

The "box" in a box plot shows the interquartile range.

Accepted Answer

A) True 
 B)False

Question 7

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 8

Community Hospital collected data on the length of time that patients stayed in the intensive care ward. The mean time was 28 days, the median 25 days, and the modal time 23 days. The standard deviation was computed to be 4.2 days. What is Pearson's coefficient of skewness in this instance?

Accepted Answer

+2.14
Explanation: 3

Question 9

A ___________ is the best way to display the relationship between two variables measured on an interval or ratio level.

Accepted Answer

The answer of A ___________ is the best way to...

Question 10

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 11

The 75th percentile is referred to as the:

Accepted Answer

A)  first quartile. 
B)  second quartile. 
C)  third quartile. 
D)  fourth quartile. 
A)  first quartile. 
B)  second quartile. 
C)  third quartile. 
D)  fourth quartile.

Question 12

For the following data, how many observations are in the data?

Accepted Answer

9
Explanation: Simply count th

Question 13

A dot plot shows ____________.

Accepted Answer

A)  The general shape of a distribution 
B)  The mean, median, and mode 
C)  The relationship between two variables 
D)  The interquartile range 
A)  The general shape of a distribution 
B)  The mean, median, and mode 
C)  The relationship between two variables 
D)  The interquartile range

Question 14

A scatter diagram is used to illustrate a relationship between gender and the preference for Coke or Pepsi.

Accepted Answer

A) True 
 B)False

Question 15

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc.
11| 1 5 9
12| 0 1 2 2 6 9
13| 0 1 2 3 4 5 5 7 8 8 9
14| 2 6 8
15| 0 1 2 4 5 7 8 9
16| 1 5 7 9
How often did the company ship more than 140 boats in a week?

Accepted Answer

15 times
Explanation: Count th

Question 16

If the coefficient of skewness is equal to zero, the shape of the distribution is __________.

Accepted Answer

A)  Negatively skewed 
B)  Symmetric 
C)  Positively skewed 
D)  Unknown 
A)  Negatively skewed 
B)  Symmetric 
C)  Positively skewed 
D)  Unknown

Question 17

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 favor gun

Question 18

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 19

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 20

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc.
11| 1 5 9
12| 0 1 2 2 6 9
13| 0 1 2 3 4 5 5 7 8 8 9
14| 2 6 8
15| 0 1 2 4 5 7 8 9
16| 1 5 7 9
What are the smallest and largest values?

Accepted Answer

111 and 169 orders
Explanation

If the mean of a distribution is smaller than the median and mode, the sign of Pearson's coefficient of skewness is ______________.

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 19 hours. What is the third quartile for the distribution of number of sales per hour?

Percentiles divide a distribution into _____________.

Draw a negatively or positively skewed distribution and show the relative locations of the mean, median, and mode.

To locate the percentile for a given observation in a data set, the data must be ___________.

The "box" in a box plot shows the interquartile range.

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

Community Hospital collected data on the length of time that patients stayed in the intensive care ward. The mean time was 28 days, the median 25 days, and the modal time 23 days. The standard deviation was computed to be 4.2 days. What is Pearson's coefficient of skewness in this instance?

A ___________ is the best way to display the relationship between two variables measured on an interval or ratio level.

The following graph is a ____________.

The 75^th percentile is referred to as the:

For the following data, how many observations are in the data?

A dot plot shows ____________.

A scatter diagram is used to illustrate a relationship between gender and the preference for Coke or Pepsi.

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 How often did the company ship more than 140 boats in a week?

If the coefficient of skewness is equal to zero, the shape of the distribution is __________.

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

What statistics are needed to draw a box plot?

The following graph illustrates _______________.

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 What are the smallest and largest values?

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

If the mean of a distribution is smaller than the median and mode, the sign of Pearson's coefficient of skewness is ______________.

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 19 hours. What is the third quartile for the distribution of number of sales per hour?

Percentiles divide a distribution into _____________.

Draw a negatively or positively skewed distribution and show the relative locations of the mean, median, and mode.

To locate the percentile for a given observation in a data set, the data must be ___________.

The "box" in a box plot shows the interquartile range.

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

Community Hospital collected data on the length of time that patients stayed in the intensive care ward. The mean time was 28 days, the median 25 days, and the modal time 23 days. The standard deviation was computed to be 4.2 days. What is Pearson's coefficient of skewness in this instance?

A ___________ is the best way to display the relationship between two variables measured on an interval or ratio level.

The following graph is a ____________.

The 75th percentile is referred to as the:

For the following data, how many observations are in the data?

A dot plot shows ____________.

A scatter diagram is used to illustrate a relationship between gender and the preference for Coke or Pepsi.

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 How often did the company ship more than 140 boats in a week?

If the coefficient of skewness is equal to zero, the shape of the distribution is __________.

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

What statistics are needed to draw a box plot?

The following graph illustrates _______________.

The following stem-and-leaf display reports the number of boats shipped per week by Ottertail Boats, Inc. 11| 1 5 9 12| 0 1 2 2 6 9 13| 0 1 2 3 4 5 5 7 8 8 9 14| 2 6 8 15| 0 1 2 4 5 7 8 9 16| 1 5 7 9 What are the smallest and largest values?

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

The 75^th percentile is referred to as the: