Question 1

In making plots of data, which of the following rules is true?

Accepted Answer

A)  Three-dimensional plots should never be used. 
B)  Rules of graphical presentation are prescriptive and should never be broken. 
C)  The ultimate goal in making plots is to make data attractive. 
D)  The point of representing data graphically is better communication. 
A)  Three-dimensional plots should never be used. 
B)  Rules of graphical presentation are prescriptive and should never be broken. 
C)  The ultimate goal in making plots is to make data attractive. 
D)  The point of representing data graphically is better communication.

Question 2

The previous graph is symmetrical.

Accepted Answer

A) True 
 B)False

Question 3

The above data set appears

Accepted Answer

A)  positively skewed. 
B)  negatively skewed. 
C)  normally distributed. 
D)  bimodal. 
A)  positively skewed. 
B)  negatively skewed. 
C)  normally distributed. 
D)  bimodal.

Question 4

Frequency distributions are used

Accepted Answer

A)  as a first step in examining data. 
B)  as a screening device to identify questionable values. 
C)  to organize data. 
D)  all of the above 
A)  as a first step in examining data. 
B)  as a screening device to identify questionable values. 
C)  to organize data. 
D)  all of the above

Question 5

Draw a distribution that is negatively skewed.

Accepted Answer

Sample neg

Question 6

Displaying data on graphs

Accepted Answer

A)  can aid communication of results to an audience. 
B)  can organize data in logical order. 
C)  can be done with computers. 
D)  all of the above 
A)  can aid communication of results to an audience. 
B)  can organize data in logical order. 
C)  can be done with computers. 
D)  all of the above

Question 7

The next six questions are based on the following data.  
-Is the distribution symmetrical?

Accepted Answer

Yes, the d

Question 8

Which of the following is the least important characteristic of graphics?

Accepted Answer

A)  clarity 
B)  beauty 
C)  simplicity 
D)  neatness 
A)  clarity 
B)  beauty 
C)  simplicity 
D)  neatness

Question 9

The Center for Disease Control has published statistics relating maternal smoking to low birth weight. The data follow in terms of the percentage of birth weights
 
Which of the following ways of presenting the data would be most informative?
​

Accepted Answer

A)  a histogram 
B)  a time series graph with a line for smokers and one for non-smokers 
C)  two pie charts 
D)  a stem-and-leaf display 
A)  a histogram 
B)  a time series graph with a line for smokers and one for non-smokers 
C)  two pie charts 
D)  a stem-and-leaf display

Question 10

If you created a stem-and-leaf display of the math SAT scores of all entering students in a large Midwestern state university, the stem would best be

Accepted Answer

A)  the numbers 0 through 10. 
B)  the numbers 200 through 800. 
C)  the numbers 2 through 8. 
D)  it is impossible to tell 
A)  the numbers 0 through 10. 
B)  the numbers 200 through 800. 
C)  the numbers 2 through 8. 
D)  it is impossible to tell

Question 11

Someone asks you if you have seen the movie Titanic . Before you answer, you look back into your memory for all of the movies you have ever seen and review the titles one at a time. This is an example of

Accepted Answer

A)  parallel processing 
B)  frequent processing 
C)  sequential processing 
D)  sensory memory 
A)  parallel processing 
B)  frequent processing 
C)  sequential processing 
D)  sensory memory

Question 12

"5s" represents what numbers on a stem-and-leaf display according to Tukey?

Accepted Answer

A)  50-51 
B)  52-53 
C)  54-55 
D)  56-57 
A)  50-51 
B)  52-53 
C)  54-55 
D)  56-57

Question 13

The next six questions are based on the following data.  
-Create a histogram for these data using an interval of 5 (e.g., 0 to 5, 6 to 10).

Accepted Answer

Sample his

Question 14

Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately

Accepted Answer

A)  4 
B)  50 
C)  10 
D)  25 
A)  4 
B)  50 
C)  10 
D)  25

Question 15

For the data referred to in the previous question, the distribution would best be called

Accepted Answer

A)  bimodal. 
B)  unimodal. 
C)  symmetric. 
D)  balanced. 
A)  bimodal. 
B)  unimodal. 
C)  symmetric. 
D)  balanced.

Question 16

The leading digits are the leaves in a stem and leaf plot.

Accepted Answer

A) True 
 B)False

Question 17

87 is the midpoint of the interval from 85 to 89.

Accepted Answer

A) True 
 B)False

Question 18

The following graph is unimodal.

Accepted Answer

A) True 
 B)False

Question 19

In deciding on the number of stems to use in a stem and leaf display,

Accepted Answer

A)  you should always break the stems into 5 stems per every 10 units. 
B)  you should normally make all of the stems the same width. 
C)  you should generally use 10 stems in all. 
D)  you should disregard the frequencies of the data. 
A)  you should always break the stems into 5 stems per every 10 units. 
B)  you should normally make all of the stems the same width. 
C)  you should generally use 10 stems in all. 
D)  you should disregard the frequencies of the data.

Question 20

A data set of test scores consisted of the following:
 
On a stem-and-leaf display, the values of the tens digits (3 - 9) are
​

Accepted Answer

A)  the trailing digits. 
B)  the leaves. 
C)  the less significant digits. 
D)  the stems. 
A)  the trailing digits. 
B)  the leaves. 
C)  the less significant digits. 
D)  the stems.

Exam 3: Displaying Data

In making plots of data, which of the following rules is true?

The previous graph is symmetrical.

The above data set appears

Frequency distributions are used

Draw a distribution that is negatively skewed.

Displaying data on graphs

The next six questions are based on the following data. -Is the distribution symmetrical?

Which of the following is the least important characteristic of graphics?

The Center for Disease Control has published statistics relating maternal smoking to low birth weight. The data follow in terms of the percentage of birth weights Which of the following ways of presenting the data would be most informative? ​

If you created a stem-and-leaf display of the math SAT scores of all entering students in a large Midwestern state university, the stem would best be

Someone asks you if you have seen the movie Titanic . Before you answer, you look back into your memory for all of the movies you have ever seen and review the titles one at a time. This is an example of

"5s" represents what numbers on a stem-and-leaf display according to Tukey?

The next six questions are based on the following data. -Create a histogram for these data using an interval of 5 (e.g., 0 to 5, 6 to 10).

Assume that you have a set of data with 70 values spread fairly evenly between 0 and 100. The optimal number of categories for a histogram of these data would be approximately

For the data referred to in the previous question, the distribution would best be called

The leading digits are the leaves in a stem and leaf plot.

87 is the midpoint of the interval from 85 to 89.

The following graph is unimodal.

In deciding on the number of stems to use in a stem and leaf display,

A data set of test scores consisted of the following: On a stem-and-leaf display, the values of the tens digits (3 - 9) are ​

Introduction

Basic Concepts

Measures of Central Tendency

Measures of Variability

The Normal Distribution

Basic Concepts of Probability

Sampling Distributions and Hypothesis Testing

Correlation

Regression

Multiple Regression

Hypothesis Tests Applied to Means: One Sample

Hypothesis Tests Applied to Means: Two Related Samples

Hypothesis Tests Applied to Means: Two Independent Samples

Power

One-Way Analysis of Variance

Factorial Analysis of Variance

Repeated-Measures Analysis of Variance

Chi-Square

Nonparametric and Resampling Statistical Tests

Meta-Analysis

Filters

The Center for Disease Control has published statistics relating maternal smoking to low birth weight. The data follow in terms of the percentage of birth weights Which of the following ways of presenting the data would be most informative?

A data set of test scores consisted of the following: On a stem-and-leaf display, the values of the tens digits (3 - 9) are