The 2004 Naples, Florida, minimarathon (13.1 miles) had 1228 registrants (Naples Daily News, January 17, 2004). Competition was held in six age groups. The following data show the ages for a sample of 40 individuals who participated in the marathon.

a. Show a stretched stem-and-leaf display.
b. What age group had the largest number of runners?
c. What age occurred most frequently?
d. A Naples Daily News feature article emphasized the number of runners who were "20 something." What percentage of the runners were in the 20-something age group? What do you suppose was the focus of the article?

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