SAS-L archives -- April 2007, week 1 (#453)

Date:	Thu, 5 Apr 2007 15:00:43 -0400
Reply-To:	"Fehd, Ronald J. (CDC/CCHIS/NCPHI)" <rjf2@CDC.GOV>
Sender:	"SAS(r) Discussion" <SAS-L@LISTSERV.UGA.EDU>
From:	"Fehd, Ronald J. (CDC/CCHIS/NCPHI)" <rjf2@CDC.GOV>
Subject:	Re: How to Interpret PROC FREQ warning
In-Reply-To:	<1175794050.668422.36760@b75g2000hsg.googlegroups.com>
Content-Type:	text/plain; charset=us-ascii

While we are on this subject:

> I do not understand what > this SAS output from PROC FREQ is telling me:

WARNING: 33% of the cells have expected counts less than 5. Chi-Square may not be a valid test.

Does anyone have the url that explains the algorithm that sas uses to generate its 'you probably don't want to trust these numbers' messages?

thanx

Ronald J. Fehd, IT Spec team lead: Office of Statistical Software and Knowledge Worker Support HelpDesk Level 3: SAS