Hi all, question on linear regression with weights - when testing residual assumptions (homoscedasticity and normality), do I need to weight the residuals with the same weight? I am using proc reg "spec" option to check for homoscedasticity and proc univariate "normal" option to check for residual normality.

And a SAS question - how come sometimes proc univariate gives Shapiro Wilk test, while other times it does not (but still gives KS, Anderson Darling, etc)?

Thanks for your help!

And a SAS question - how come sometimes proc univariate gives Shapiro Wilk test, while other times it does not (but still gives KS, Anderson Darling, etc)?

Thanks for your help!

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