Date: Thu, 23 Jun 2005 10:18:00 -0700
Sender: "SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From: "David L. Cassell" <cassell.david@EPAMAIL.EPA.GOV>
Subject: Re: Exact confidence interval for the difference
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> One of our statisticians wants to know:
> Does anyone know if SAS or R can compute an exact confidence interval
> the difference
> in 2 binomial proportions?...the only package that I have ever seen do
> this calculation is StatXact...
SAS doesn't do an exact CI for the difference in 2 binomial
This is fine by me. If you read Alan Agresti's 1992 paper "A Survey
of Exact Inference for Contingency Tables", you'll see that he finds
there are problems with defining an 'exact' test in this case.
David Cassell, CSC
Senior computing specialist