# Title: Accidents in 5 weeks to 647 women working on high-explosive shells
# 1: Number of accidents
# 2: Observed frequency
# 3: Poisson expected frequency
#
#  Reference:
#  M Greenwood, G Yule,
#  An inquiry into the nature of frequency-distributions of multiple happenings,
#  Journal of the Royal Statistical Society,
#  Volume 83, pages 255-279, 1920.
#
0  447  406.3
1  132  189.0
2   42   44.0
3   21    6.8
4    3    0.8
5    2    0.1