Hi to all,
For some years I have been teaching a technique which I know as testing
the components of chi square in a standard contingency table problem. If
you calculate the standardised residual
SR = (fo - fe)/sqrt(fe)
for each cell, these residuals are approximately normally distributed
with mean zero and standard error given by
SE = sqrt((1 - rowsum/overallsum)*(1-columnsum/overallsum))
provided the expected frequencies are large enough (as for the use of
chi square itself).
My problem is that I have no source for this technique. I have never
seen it in a textbook. (I have no doubt about its validity, and frankly
don't understand why textbooks do not refer to it.)
Can anyone give me a reference to it? Ideally, a reference to its
original publication.
My thanks in advance.
Alan
--
Alan McLean ([EMAIL PROTECTED])
Department of Econometrics and Business Statistics
Monash University, Caulfield Campus, Melbourne
Tel: +61 03 9903 2102 Fax: +61 03 9903 2007
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