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Tips Talk:Effect coding and class variables in PROC LOGISTIC

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Excellent tip. Looks good to me. --Donh 17:22, 22 February 2009 (EST)

I changed the wording to make the fact that param=ref produced reference cell coding and it is OK by me--Hamer 17:19, 23 February 2009 (EST)

I added that reference cell coding is the same as dummy coding.

This is good. It would be nice if the PDF of the NESUG paper were also on so that it would be found by the search engine. --Statprof 10:40, 26 February 2009 (EST)