Chapter 1: Q 108. (page 77)
Healthy fast food? Refer to Exercises 102 and 106. Identify any outliers in the distribution. Show your work.
There are no outliers.
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Value of a diploma Do students who graduate from high school earn more money than students who do not? To find out, we took a random sample of 371 U.S. residents aged 18 and older. The educational level and total personal income of each person were recorded. The data for the 57 non-graduates (No) and the 314 graduates (Yes) are displayed in the relative frequency histograms.
Part (a). Would it be appropriate to use frequency histograms instead of relative frequency histograms in this setting? Explain why or why not.
Part (b). Compare the distributions of total personal income for the two groups.
Multiple Choice Select the best answer.
Exercises 9 and 10 refer to the following setting. At the Census Bureau website www.census.gov, you can view detailed data collected by the American Community Survey.
The following table includes data for 10 people chosen at random from the more than 1 million people in households contacted by the survey. “School” gives the highest level of education completed.
The individuals in this data set are
(a) households.
(b) people.
(c) adults.
(d) 120 variables.
(e) columns
For which of the following would it be inappropriate to display the data with a single pie chart?
(a) The distribution of car colors for vehicles purchased in the last month
(b) The distribution of unemployment percentages for each of the 50 states
(c) The distribution of favorite sport for a sample of 30 middle school students (d) The distribution of shoe type worn by shoppers at a local mall
(e) The distribution of presidential candidate preferences for voters in a state
Who buys cars? A car dealer keeps records on car buyers for future marketing purposes. The table gives information on the last 4 buyers.
Part (a). Identify the individuals in this data set.
Part (b). What variables were measured? Classify each as categorical or quantitative.
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%.
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