January 30, 2007
Fire and Materials 2007
8
Statistical significance
Hypergeometric
distribution (aka Lotto)
n
is the number of houses in a population N
t is the number of houses
of type T
s
in the number of houses in a subset S of N (S
will be either the surviving or the destroyed houses)
p
computes the exact probability, in a randomly chosen subset S
of N of size s, that S contains at most m
houses of type T
This is a one-tailed distribution
Curved-tile results: Back loop
p = 0.039
Adjacent destroyed home p = 0.011
Adjacent destroyed home p = 0.011