In this experiment, data were collected on the same days in two consecutive years, and
speed limits were sometimes enforced in either. The purpose of the analysis is to analyse
the effect of the traffic limits.
a data frame in long format of 184 observations on the following variables
accidentsinteger; daily number of accident
dayinteger; day of the experiment, ranging from 1 to 92
yearinteger; year of the measurement, either 1961 or 1962
limitlogical: was a speed limit enforced?
References
Svensson, A. (1981) On a goodness-of-fit test for multiplicative Poisson models. Annals of Statistics 9, 697–704.