Alcohol-Related Motor Vehicle Fatalities. Figure 5.11 shows the number of motor vehicle fatalities in the United States in which alcohol was involved for each year from 1982 to 2010.
a. Approximately how many alcohol-related fatalities were there in 1982? in 2011? Comment on the overall trend over this period.
b. What is the percent change in alcohol-related fatalities over this period?
c. The total numbers of automobile fatalities in 1982 and 2011 were 43,945 and 32,367, respectively. What percentage of all fatalities an these two years involved alcohol?
d. In view of your answer to part (c), can you offer explanations for the trend in these data? Explain.
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