Dataset: friday13.dat

Source: S. Nayha(2002). "Traffic Deaths and Superstition on Friday the 13th"
American Journal of Psychiatry, Vol. 159. pp 2110-2111.

Description: Daily deaths by trsffic accidents for Friday the 13th and
other Fridays by genderin Finland 1971-1997.

Variables/Columns
Gender   1  /*  1=Male 2=Female
Friday type   3  /* 1=13th  2=Other
Deaths      6-9
Exposure    13-18   /* Person-days(*10^6)