1.33 Are highways getting safer? How can we begin to measure possible improvements in the travel by motor vehicle? One possibility is to study traffic safety data for any discernable patterns or trends.

The motor vehicle death rates (deaths per 100 million miles driven) for the 50 states plus the District of Columbia are listed in the Table 1.13 (U.S.

National Highway Safety Traffic Administration,

Central Park, New York, and Newnan, Georgia, for the years 1901–2000.
a Make a histogram of temperatures for each location.
b Make parallel boxplots for temperatures.
Comment on the distributions of temperatures.
c Compare the distributions of temperatures at Central Park and Newnan.