70 Chapter 2 Graphical Summaries of Data USING TECHNOLOGY We use the data in Table 2.16 to illustrate the technology steps. MINITAB Constructing a stem-and-leaf plot and dotplot Step 1. Name your variable Final Exam and enter the data from Table 2.16 into Column C1. Step 2. Click on Graph. Select Stem-and-Leaf or Dotplot. For Dotplot, choose the Simple option. Press OK. Step 3. Double-click on the Final Exam variable and press OK. (See Figures A and B.) Figure A Figure B SECTION 2.3 Exercises Exercises 1 and 2 are the Check Your Understanding exercises located within the section. Understanding the Concepts In Exercises 3–6, fill in each blank with the appropriate word or phrase. 3. In a stem-and-leaf plot, the rightmost digit of each data value is the . 4. In a back-to-back stem-and-leaf plot, each of the two data sets plotted must have the same . 5. A is useful when the data consist of values measured at different points in time. 6. In a time-series plot, the horizontal axis represents . In Exercises 7–10, determine whether the statement is true or false. If the statement is false, rewrite it as a true statement. 7. Stem-and-leaf plots and dotplots provide a simple way to display data for small data sets. 8. In a stem-and-leaf plot, each stem must be a single digit. 9. In a dotplot, the number of dots in a vertical column represents the number of times a certain value appears in a data set. 10. In a time-series plot, the vertical axis represents time. Practicing the Skills 11. Construct a stem-and-leaf plot for the following data. 57 20 27 16 11 12 29 39 45 52 58 15 46 27 22 21 15 50 16 45 20 55 12 31 12. Construct a stem-and-leaf plot for the following data, in which the leaf represents the hundredths digit. 5.03 4.99 4.95 5.01 4.99 5.03 4.91 5.25 4.80 5.24 4.94 5.04 5.17 4.81 5.22 4.92 5.05 4.89 5.19 5.17 5.25 5.14 5.10 4.94 5.19 4.99 13. List the data in the following stem-and-leaf plot. The leaf represents the ones digit. 3 0 0 1 2 3 5 6 7 7 9 4 2 3 4 4 5 6 7 7 7 7 8 8 9 5 0 1 1 1 2 2 2 2 4 5 6 7 8 8 9 6 1 3 6
navidi_monk_essential_statistics_1e_ch1_3
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