TASK: Model the frequency of crashes. This data set consists of all drivers involved in a crash in 2004 in New South Wales, Australia. There are a total of 82659 drivers in the data set. Drivers with unknown age, age less than 17 years, or road user class ``Other" are omitted, leaving 76341 cases. Variables: agecat driver's age, coded as 1 = 17-20 2 = 21-25 3 = 26-29 10 = 30-39 (4 coded as 10 to be base level) 5 = 40-49 6 = 50-59 7 = 60+ roaduserclass 10 = car (coded to be base level) 2 = light truck 4 = bus / heavy rigid truck / articulated truck 6 = motorcycle sex driver's sex: M, F degree degree of crash, coded as 1 = non-casualty 2 = injury 3 = fatal number frequency of crashes