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Chapter 1: Q 34. (page 28)

Popular car colors Favorite car colors may differ among countries. The side-by-side bar graph displays data on the most popular car colors in a recent year for North America and Asia. Write a few sentences comparing the distributions.

Short Answer

Expert verified

white is the most preferred car colour in Asia whereas Green is the least popular.

White is also the most popular automotive colour in North America. Green and yellow are the least popular automobile colours in North America.

Step by step solution

01

Step 1. Given information.

The given bar graph is shown below:

02

Step 2. Compare the distributions.

We can see that white is the most common car colour in Asia because the category White has the largest green bar. Green is the least popular automotive colour in Asia since the category Green has the lowest green bar.

White is also the most popular automotive colour in North America since the category White has the largest red bar. Green and yellow are the least common automotive colours in North America since the category Green and Yellow has the lowest green bars.

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Most popular questions from this chapter

The histogram shows the distribution of the percent of women aged 15 and over who have never married in each of the 50 states and the District of Columbia. Which of the following statements about the histogram is correct?

a. The center (median) of the distribution is about 36%.

b. There are more states with percentages above 32 than there are states with percentages less than 24.

c. It would be better if the values from 34 to 50 were deleted on the horizontal axis so there wouldn’t be a large gap.

d. There was one state with a value of exactly 33%.

e. About half of the states had percentages between 24% and 28%.

Enhancing creativity Do external rewards—things like money, praise, fame, and grades —promote creativity? Researcher Teresa Amabile recruited 47 experienced creative writers who were college students and divided them at random into two groups. The students in one group were given a list of statements about external reasons (E) for writing, such as public recognition, making money, or pleasing their parents. Students in the other group were given a list of statements about internal reasons (I) for writing, such as expressing yourself and enjoying wordplay. Both groups were then instructed to write a poem about laughter. Each student’s poem was rated separately by 12 different poets using a creativity scale. 26 These ratings were averaged to obtain an overall creativity score for each poem. Parallel dotplots of the two groups’ creativity scores are shown here.

Part (a). Is the variability in creativity scores similar or different for the two groups? Justify your answer.

Part (b). Do the data suggest that external rewards promote creativity? Justify your answer.

Superpower Refer to Exercise 24.

(a) What proportion of students in the sample who prefer invisibility as their superpower are from the United States?

(b) What percent of students in the sample who are from the United Kingdom prefer superstrength as their superpower?

Feeling sleepy? Refer to Exercise 45. Describe the shape of the distribution.

Superpowers A total of 415 children from the United Kingdom and the United States who completed a survey in a recent year were randomly selected. Each student’s country of origin was recorded along with which superpower they would most like to have: the ability to fly, ability to freeze time, invisibility, superstrength, or telepathy (ability to read minds). The data are summarized in the following table.

(a) What proportion of students in the sample are from the United States?

(b) Find the distribution of superpower preference for the students in the sample using relative frequencies.

(c) What percent of students in the sample are from the United Kingdom and prefer telepathy as their superpower preference?
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