Eighty adults were asked to watch a 30-minute infomercial until the presentation ended or until boredom became intolerable. The following table lists the frequency distribution of the times that these adults were able to watch the infomercial. 2.2 Organizing and Graphing Quantitative Data 53
Time Number of
(minutes) Adults
0 to less than 6......... 16
6 to less than 12......... 21
12 to less than 18........ 18
18 to less than 24........ 11
24 to less than 30........ 14
Draw two histograms for these data, the first without truncating the frequency axis. In the second case, mark the frequencies on the vertical axis starting with 10. Briefly comment on the two histograms.