1
$\begingroup$

This question already has an answer here:

I am using SAS 9.4 . My aim is to find out whether my residual is normal or not, so i type this:

proc univariate data= residual normal; var rstd; qqplot rstd/ norml(mu=est sigma=est); run;

In my output the qqplot is clearly a straight while 4 pavlue of statistic for the normality is less then 5%.

How can i interpret this? enter image description here enter image description here

$\endgroup$

marked as duplicate by kjetil b halvorsen, gung - Reinstate Monica regression Oct 30 '16 at 13:00

This question has been asked before and already has an answer. If those answers do not fully address your question, please ask a new question.

  • 1
    $\begingroup$ Can you show the qq-plot? $\endgroup$ – JAD Oct 30 '16 at 9:21
  • $\begingroup$ currently i don't have the computer but i can tell you the points are nearly falling on the normal line , no heavytailness $\endgroup$ – Gillian Cheung Oct 30 '16 at 9:25
  • 3
    $\begingroup$ What is your sample size? If it is large, then the p value will be low even for tiny violations of normality $\endgroup$ – Peter Flom - Reinstate Monica Oct 30 '16 at 11:48
  • 2
    $\begingroup$ my sample size is 270,and i have attached the photos $\endgroup$ – Gillian Cheung Oct 30 '16 at 11:52
  • 1
    $\begingroup$ "In my output the qqplot is clearly a straight". That is a subjective statement. IMO it is not clearly a straight line. $\endgroup$ – Jorge Leitao Oct 30 '16 at 12:03