May check for outliers as well which could influence the range of the distribution

Thank you

Dear Bendaoud Nadif . See the following useful link: https://quantifyinghealth.com/report-shapiro-wilk-test/#:~:text=The%20Shapiro%2DWilk%20test%20is,variable%20is%20NOT%20normally%20distributed.

Kindly see also the following useful link: https://www.isixsigma.com/tools-templates/normality/dealing-non-normal-data-strategies-and-tools/

Also check please the following useful link: https://www.statisticshowto.com/probability-and-statistics/non-normal-distributions/

Thank you

Use an appropriate glm family function

Thank you. I will do so.

Bendaoud Nadif, You are welcome. If it doesn't work, you may try any alternate non-parametric test

Best!!

AN

Yes , I agree

Alright, dear colleagues

I will try out non-parametric tests to see the results.