In Exercise 9, you analyzed the ages (in years) of 1089 people (on foot or in a vehicle) stopped by police in New York City on December 1, 2012 (see Fig. 89). Some of the ages are less than 10 years or greater than 65 years, but the bars for those ages would not be visible.

a. Find the proportion of those stopped whose ages were between 15 and 19 years, inclusive.
b. There was just one child under the age of 10 years who was stopped. Find the proportion of those stopped whose ages were at most 29 years.
c. Find the proportion of those stopped whose ages were at least 20 years.
d. On the basis of the histogram, a student concludes that on any day, 27% of those who are stopped are between the ages of 20 and 24 years, inclusive. What would you tell the student?

Ages of People Stopped by Police 0.29 0.3 0.27 0.2 0.14 0.09 0.05 0.04 0.04 0.02 0.02 0.01 0.02 10 15 20 25 30 35 40 45 50 55 60 65 Ages (years)