2.2 EXERCISES 62 CHAPTER 2 Descriptive Statistics For Extra Help: MyLab Statistics Building Basic Skills and Vocabulary 1. Name some ways to display quantitative data graphically. Name some ways to display qualitative data graphically. 2. What is an advantage of using a stem-and-leaf plot instead of a histogram? What is a disadvantage? 3. In terms of displaying data, how is a stem-and-leaf plot similar to a dot plot? 4. How is a Pareto chart different from a standard vertical bar graph? Putting Graphs in Context In Exercises 5–8, match the plot with the description of the sample. 5. 0 8 Key: 00 8 = 0.8 1 5 6 8 2 1 3 4 5 3 0 9 4 0 0 6. 6 7 8 Key: 60 7 = 67 7 4 5 5 8 8 8 8 1 3 5 5 8 8 9 9 0 0 0 2 4 7. 5 10152025303540 8. 200 205 210 215 220 (a) Times (in minutes) it takes a sample of employees to drive to work (b) Grade point averages of a sample of students with finance majors (c) Top speeds (in miles per hour) of a sample of high-performance sports cars (d) Ages (in years) of a sample of residents of a retirement home Graphical Analysis In Exercises 9–12, use the stem-and-leaf plot or dot plot to list the actual data entries. What is the maximum data entry? What is the minimum data entry? 9. 2 7 Key: 20 7 = 27 3 2 4 1 3 3 4 7 7 8 5 0112333444456689 6 8 8 8 7 3 8 8 8 5 10. 12 Key: 120 9 = 12.9 12 9 13 3 13 6 7 7 14 1 1 1 1 3 4 4 14 6 9 9 15 0 0 0 1 2 4 15 6 7 8 8 8 9 16 1 16 6 7 11. 13 14 15 16 17 18 19 12. 215 220 225 230 235
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