Data from a study in England in two periods from November 1969 to
October 1971 and November 1971 to October 1973. A new compulsory
safety measure for trucks was introduced in October 1971. Therefore,
the question is whether the safety measure had an effect on the number
of accidents and on the point of collision on the truck.
Usage
data(Trucks)
Arguments
source
E. B. Andersen (1991),
The Statistical Analysis of Categorical Data, Table 6.8.
References
E. B. Andersen (1991),
The Statistical Analysis of Categorical Data.
2nd edition.
Springer-Verlag, Berlin.