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Figure 1.2 You can use a pie chart to display the distribution of a categorical variable. Here is a pie chart of

the distribution of intended majors of students entering college.


Figure 1.3 Bar graphs of the distribution of intended majors of students entering college. In (a), the bars follow

the alphabetical order of fields of study. In (b), the same bars appear in order of height.


Figure 1.5 Histogram of the distribution of the percent of foreign-born residents in the 50 states and the

District of Columbia, for Example 1.4.


Figure 1.6 Another histogram of the distribution of the percent of foreign-born residents, with classes half as

wide as in Figure 1.5. Histograms with more classes show more detail but may have a less clear pattern.


Figure 1.7 Histogram of the Iowa Test vocabulary scores of all seventh-grade students in Gary, Indiana, for

Example 1.6. This distribution is single-peaked and symmetric.


Figure 1.9 Histogram of the state percents of women aged 15 and over who have never been married, for

Exercise 1.9.


Figure 1.10 Stemplot of the percents of foreign-born residents in the states, for Example 1.8. Each stem is a

percent and leaves are tenths of a percent.


Figure 1.11 Stemplot of the breaking strength of pieces of wood, rounded to the nearest hundred pounds, for

Example 1.9. Stems are thousands of pounds and leaves are hundreds of pounds.


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Figure 1.12 Time plot of average gauge height at a monitoring station in Everglades National Park over a

nine-year period, for Example 1.10. The yearly cycles reflect Florida’s wet and dry seasons.

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