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    Normality tests for SAS

    Hi All, I just ran the PROC MIXED for outputting the residual error in SAS [TO CHECK FOR NORMALITY] I am wondering if I need to look at Shapiro-Wilk or Kolmogorov-Smirnov tests? My sample size is 217 [repeated at 3 time points]. So, when I check for the normality of the residual error, do I...