Hi guys,

I am running a multiple linear regression model and to check the assumption of normality of the residuals are satisfied i did a QQplot with the following code:
qnorm Resid
My residuals generally follow the line but it looks like there could be a problem with the tales.

I would like to add confidence bonds to this QQplot. I have researched online but i have not been able to find a code that i was able to use yet

Does anyone have experience with this?

All the best,