Question 1

On a recent fundraising drive, most of the 30 volunteers raised between $10 and $50 each. However, Brian and Karen each raised over $100. Which of the following is true?

Accepted Answer

A)   The amounts of money raised by Brian and Karen are outliers.
B)   The data would best be represented three-dimensionally.
C)   The data appear negatively skewed.
D)   The data should be represented on a back-to-back stem-and-leaf display.

Question 2

Inglehart (1990)  presented data on the mean Satisfaction with Life scores for 24 developed countries. These data follow:

A histogram of these data would be
​

Accepted Answer

A)   reasonably symmetric.
B)   positively skewed.
C)   very bimodal.
D)   impossible to draw.

Question 3

Answer the following questions based on the graph below. 
  
a. Is the graph symmetrical? 
b. Is the graph unimodal or bimodal? 
c. Do the data appear skewed?   If so, positively or negatively? 
d. Do there appear to be outliers? If so, for what values?

Accepted Answer

a. The graph is not symmetrical. 
b. The graph is unimodal. 
c. The data are positively skewed. 
d. There are no outliers.

Question 4

A negatively skewed distribution

Accepted Answer

A)   has a tail pointing to the left.
B)   has a tail pointing to the right.
C)   is symmetric.
D)   is also positively skewed. A

Question 5

The data in the previous question show a much higher incidence of low birth weight babies from mothers who smoke. This finding is likely to be a reliable one because

Accepted Answer

A)   everyone knows that smoking is a bad thing.
B)   the smokers rate of low birth weight is twice that of the non-smokers.
C)   the pattern of differences occurs reliably over each of 5 years.
D)   there is a general increase in low birth weight over the years.

Question 6

Skewness refers to how symmetrical or assymetrical a distribution is.

Accepted Answer

A) True 
 B)False

Question 7

An outlier refers to data that falls toward the middle of a distribution.

Accepted Answer

A) True 
 B)False

Question 8

On October 25, 1978 the Washington Post presented a graphic showing the declining purchasing power of the U.S. dollar. What was worth $1 in 1958 was worth only $0.44 in 1978. They illustrated the decline in value by showing a dollar that was 3 inches by 1 inch in 1959, and one that was 1.32 inches (44% of 3 inches)  by .44 inches in 1978. What is wrong with this kind of a display?

Accepted Answer

A)   You can't equate dollars in 1958 with dollars in 1978.
B)   The dollar actually increased in purchasing power over that period of time.
C)   There is nothing wrong with doing this.
D)   The area of the dollar is reduced by more than .44%.

Question 9

The next six questions are based on the following data. 
-Create a frequency distribution for these data.

Accepted Answer

A chart and a graphi...

Question 10

The next six questions are based on the following data. 
-Which graphical technique do you think displays the data least effectively? Why?

Accepted Answer

The frequency distribution is least effe...

Question 11

The onset of eating disorders was shown to occur most often during puberty and during the late teen years in girls. A distribution of the frequencies of onset of eating disorders by age would most likely be

Accepted Answer

A)   unimodal.
B)   normal.
C)   bimodal.
D)   all of the above

Question 12

A normal distribution must

Accepted Answer

A)   have outliers.
B)   be symmetric.
C)   be positively skewed.
D)   be negatively skewed.

Question 13

Outliers are

Accepted Answer

A)   extreme or unusual values.
B)   the lowest value in a data set.
C)   the lowest and highest scores in a data set.
D)   all of the above

Question 14

Boxplots are graphical displays that

Accepted Answer

A)   emphasize the basic characteristics of the data.
B)   focus on the median and spread of the data.
C)   allow us to visually see how two or more distributions compare.
D)   all of the above D

Question 15

Answer the following questions based on the graph below. 
  
a. Is the graph symmetrical? 
b. Is the graph unimodal or bimodal? 
c. Do the data appear skewed?   If so, positively or negatively? 
d. Do there appear to be outliers? If so, for what values?

Accepted Answer

a. Yes, the graph is symmetric...

Question 16

Assume that we had the following set of data:

T hese data would most likely be characterized as

Accepted Answer

A)   positively skewed.
B)   normal.
C)   negatively skewed.
D)   uniformly distributed.

Question 17

A stem-and-leaf display is often

Accepted Answer

A)   a simplified representation of the underlying data.
B)   a quick way to draw a histogram.
C)   more informative than the corresponding histogram.
D)   all of the above

Question 18

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

Accepted Answer

A)   the numbers 2 through 8.
B)   the numbers 0 through 9 (with code |6|5 = 650) .
C)   t, f, c.
D)   the symbols * and .

Question 19

Use two terms to describe the following data.

Accepted Answer

Possible answers inc...

Question 20

If the distribution of the ages of people were positively skewed, which of the following is most likely correct?

Accepted Answer

A)   There are about the same number of young people as old people.
B)   There are more young people than old people.
C)   There are more old people than young people.
D)   none of the above

Exam 3: Displaying Data

On a recent fundraising drive, most of the 30 volunteers raised between $10 and $50 each. However, Brian and Karen each raised over $100. Which of the following is true?

Correct Answer
verified

Inglehart (1990) presented data on the mean Satisfaction with Life scores for 24 developed countries. These data follow: A histogram of these data would be

Correct Answer
verified

Answer the following questions based on the graph below. a. Is the graph symmetrical? b. Is the graph unimodal or bimodal? c. Do the data appear skewed? If so, positively or negatively? d. Do there appear to be outliers? If so, for what values?

Correct Answer
verified
a. The graph is not symmetrical. b. The graph is unimodal. c. The data are positively skewed. d. There are no outliers.

A negatively skewed distribution

Correct Answer
verified
A

The data in the previous question show a much higher incidence of low birth weight babies from mothers who smoke. This finding is likely to be a reliable one because

Correct Answer
verified

Skewness refers to how symmetrical or assymetrical a distribution is.

Correct Answer
verified

An outlier refers to data that falls toward the middle of a distribution.

Correct Answer
verified

Correct Answer
verified

The next six questions are based on the following data. -Create a frequency distribution for these data.

Correct Answer
verified
A chart and a graphi...
View Answer

The next six questions are based on the following data. -Which graphical technique do you think displays the data least effectively? Why?

Correct Answer
verified
The frequency distribution is least effe...
View Answer

The onset of eating disorders was shown to occur most often during puberty and during the late teen years in girls. A distribution of the frequencies of onset of eating disorders by age would most likely be

Correct Answer
verified

A normal distribution must

Correct Answer
verified

Outliers are

Correct Answer
verified

Boxplots are graphical displays that

Correct Answer
verified
D

Answer the following questions based on the graph below. a. Is the graph symmetrical? b. Is the graph unimodal or bimodal? c. Do the data appear skewed? If so, positively or negatively? d. Do there appear to be outliers? If so, for what values?

Correct Answer
verified
a. Yes, the graph is symmetric...
View Answer

Assume that we had the following set of data: T hese data would most likely be characterized as

Correct Answer
verified

A stem-and-leaf display is often

Correct Answer
verified

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

Correct Answer
verified

Use two terms to describe the following data.

Correct Answer
verified
Possible answers inc...
View Answer

If the distribution of the ages of people were positively skewed, which of the following is most likely correct?

Correct Answer
verified

Exam 3: Displaying Data

On a recent fundraising drive, most of the 30 volunteers raised between $10 and $50 each. However, Brian and Karen each raised over $100. Which of the following is true?

Correct AnswerverifiedShow Answer

Inglehart (1990) presented data on the mean Satisfaction with Life scores for 24 developed countries. These data follow: A histogram of these data would be ​

Correct AnswerverifiedShow Answer

Answer the following questions based on the graph below. a. Is the graph symmetrical? b. Is the graph unimodal or bimodal? c. Do the data appear skewed? If so, positively or negatively? d. Do there appear to be outliers? If so, for what values?

Correct Answerverifieda. The graph is not symmetrical. b. The graph is unimodal. c. The data are positively skewed. d. There are no outliers.

A negatively skewed distribution

Correct AnswerverifiedA

The data in the previous question show a much higher incidence of low birth weight babies from mothers who smoke. This finding is likely to be a reliable one because

Correct AnswerverifiedShow Answer

Skewness refers to how symmetrical or assymetrical a distribution is.

Correct AnswerverifiedShow Answer

An outlier refers to data that falls toward the middle of a distribution.

Correct AnswerverifiedShow Answer

Correct AnswerverifiedShow Answer

The next six questions are based on the following data. -Create a frequency distribution for these data.

Correct AnswerverifiedA chart and a graphi...View AnswerShow Answer

The next six questions are based on the following data. -Which graphical technique do you think displays the data least effectively? Why?

Correct AnswerverifiedThe frequency distribution is least effe...View AnswerShow Answer

The onset of eating disorders was shown to occur most often during puberty and during the late teen years in girls. A distribution of the frequencies of onset of eating disorders by age would most likely be

Correct AnswerverifiedShow Answer

A normal distribution must

Correct AnswerverifiedShow Answer

Outliers are

Correct AnswerverifiedShow Answer

Boxplots are graphical displays that

Correct AnswerverifiedD

Answer the following questions based on the graph below. a. Is the graph symmetrical? b. Is the graph unimodal or bimodal? c. Do the data appear skewed? If so, positively or negatively? d. Do there appear to be outliers? If so, for what values?

Correct Answerverifieda. Yes, the graph is symmetric...View AnswerShow Answer

Assume that we had the following set of data: T hese data would most likely be characterized as

Correct AnswerverifiedShow Answer

A stem-and-leaf display is often

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

Use two terms to describe the following data.

Correct AnswerverifiedPossible answers inc...View AnswerShow Answer

If the distribution of the ages of people were positively skewed, which of the following is most likely correct?

Correct AnswerverifiedShow Answer

Correct Answer
verified

Inglehart (1990) presented data on the mean Satisfaction with Life scores for 24 developed countries. These data follow: A histogram of these data would be

Correct Answer
verified

Correct Answer
verified
a. The graph is not symmetrical. b. The graph is unimodal. c. The data are positively skewed. d. There are no outliers.

Correct Answer
verified
A

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
verified
A chart and a graphi...
View Answer

Correct Answer
verified
The frequency distribution is least effe...
View Answer

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified
D

Correct Answer
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a. Yes, the graph is symmetric...
View Answer

Correct Answer
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Correct Answer
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Correct Answer
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Correct Answer
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Possible answers inc...
View Answer

Correct Answer
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