Message-ID: <20110401232448.20386ud3gd2ka1ls@webmail.unibw-hamburg.de>
Date: 2011-04-01T21:24:48Z
From: sahin at hsu-hh.de
Subject: qcc.overdispersion-test
Hi all,
I have made an overdispersion test for a data set and get the following result
Overdispersion test Obs.Var/Theor.Var Statistic p-value
poisson data 16.24267 47444.85 0
after deleting the outliers from the data set I get the following result
Overdispersion test Obs.Var/Theor.Var Statistic p-value
poisson data 16.27106 0 1
The problem is that the overdispersion parameter does not really
change, but how could the p-value and the statistic change so that the
null hypothesis is accepted??
I would be very grateful if someone could help me?