Table 6.15 is based on automobile accident records in 1988, supplied by the state of Florida Department of Highway Safety and Motor Vehicles. Subjects were classified by whether they were wearing a seat belt, whether ejected, and whether killed.

a. Find a loglinear model that describes the data well. Interpret the associations.

b. Treating whether killed as the response variable, fit an equivalent logit model. Interpret the effects on the response.

c. Since the sample size is large, goodness-of-fit statistics are large unless the model fits very well. Calculate the dissimilarity index, and interpret.

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Table 6.15 Safety Equipment Whether In Use Ejected No Seat belt Yes 1105 No 411,111 None Yes No 4624 157,342 Source: Florida Department of Highway Safety and Motor Vehicles, Tallahassee, FL. Killed Yes 14 483 497 1008