To determine premiums for automobile insurance, companies must have an understanding of the variables that affect whether a driver will have an accident. The age of the driver may top the list of variables. The following table lists the number of drivers in the United States, the number of fatal accidents, and the number of total accidents in each age group in 2002.

a. Calculate the accident rate (per driver) and the fatal accident rate (per 1,000 drivers) for each age group.

b. Graphically depict the relationship between the ages of drivers, their accident rates, and their fatal accident rates (per 1,000 drivers).

c. Briefly describe what you havelearned.

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Number of Number Number of Drives Accidents of Fatal Age Group (1,000s 1,000s) Accidents Under 20 20-24 25-34 35-44 45-54 55-64 65-74 Over 74 Total 9,508 16,768 33,734 41,040 38,711 25,609 15,812 12,118 193,300 3,543 2,901 7,061 6,665 5,136 2,775 1,498 1,121 30,700 6,118 5,907 10,288 10,309 8,274 5,322 2,793 3,689 52,700