Thank you Chris. It makes sense. I run the product_status and SAS/QC is not part of it. Yes, I am running SAS Univ Edition. So the question now is: in order to check the normality of the variables, besides drawing the historgrams, what other proc can I run that gives me the normality check? Also, how can I get the the line of the bell curve drawn over the histogram? Thanks again, Melva
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