Question: Drivers licenses 2011 The table on the next page shows the number of licensed U.S. drivers (in millions) by age and by sex (www.dot.gov). a)

Drivers’ licenses 2011 The table on the next page shows the number of licensed U.S. drivers (in millions) by age and by sex (www.dot.gov).

a) What percent of total drivers are under 20?

b) What percent of total drivers are male?

c) Write a few sentences comparing the number of male and female licensed drivers in each age group.

d) Do a driver’s age and sex appear to be independent?

Explain.

Age Male Drivers (millions) Female Drivers Total (millions) 19 and Under 5.1

Age Male Drivers (millions) Female Drivers Total (millions) 19 and Under 5.1 4.9 10.0 20-24 8.7 8.6 17.3 25-29 9.2 9.2 18.4 30-34 8.9 8.9 17.8 35-39 9.7 9.6 19.3 40-44 9.9 9.8 19.7 45-49 10.6 10.7 21.3 50-54 10.1 10.2 20.3 55-59 8.7 8.9 17.6 60-64 7.2 7.3 14.5 65-69 5.3 5.4 10.7 70-74 3.8 4.0 7.8 75-79 2.9 3.2 6.1 80-84 2.0 2.4 4.4 85 and Over 1.4 1.7 3.1 Total 103.5 104.8 208.3

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