Chapter 1: Q 62. (page 47)
Die rolls Imagine rolling a fair, six-sided die times. Draw a plausible graph of the distribution of die rolls. (Hint: Should you use a bar graph or a histogram?)
Short Answer

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Chapter 1: Q 62. (page 47)
Die rolls Imagine rolling a fair, six-sided die times. Draw a plausible graph of the distribution of die rolls. (Hint: Should you use a bar graph or a histogram?)

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A study among the Pima Indians of Arizona investigated the relationship between a mother’s diabetic status and the appearance of birth defects in her children. The results appear in the two-way table below.

(a) Fill in the row and column totals in the margins of the table. (b) Compute (in percents) the conditional distributions of birth defects for each diabetic status. (c) Display the conditional distributions in a graph. Don’t forget to label your graph completely. (d) Comment on any clear associations you see.
About 1.6 million first-year students enroll in colleges and universities each year. What do they plan to study? The graph displays data on the percent of first-year students who plan to major in several discipline areas.

Would it be correct to describe this distribution as right-skewed? Why or why not?
Cool car colors The most popular colors for cars and light trucks change over time. Silver passed green in to become the most popular color worldwide, then gave way to shades of white in . Here is the distribution of colors for vehicles sold in North America in
(a) What percent of vehicles had colors other than those listed?
(b) Display these data in a bar graph. Be sure to label your axes and title your graph.
(c) Would it be appropriate to make a pie chart of these data? Explain.

Do women study more than men? We asked the students in a large first-year college class how many minutes they studied on a typical weeknight. Here are
the responses of random samples of women and men from the class:

(a) Examine the data. Why are you not surprised that most responses are multiples of 10 minutes? Are there any responses you consider suspicious?
(b) Make a back-to-back stem plot to compare the two samples. Does it appear that women study more than men (or at least claim that they do)? Justify your answer.
One of the following scores was omitted from the stem plot below:

The missing number is
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