19. Sorting through unsolicited e-mail and spam affects the productivity of office workers. An InsightExpress survey monitored office workers to determine the unproductive time per day devoted to unsolicited e-mail and spam (USA Today, November 13, 2003). The following data show a sample of time in minutes devoted to this task.

Summarize the data by constructing the following:

a. A frequency distribution (Classes 1–5, 6–10, 11–15, 16–20, and so on)

b. A relative frequency distribution

c. A cumulative frequency distribution

d. A cumulative relative frequency distribution

e. An ogive

f. What percentage of office workers spend 5 minutes or less on unsolicited e-mail and spam? What percentage of office workers spend more than 10 minutes a day on this task?

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