Calculating normality for a two way ANOVA with repeated measures

Question

I am trying to calculate if my residuals are normally distributed for my two way ANOVA with repeated measures on Rstudio.

However, all the tutorials I find seem to specific to one way within ANOVAs or two way between ANOVAs.

If anyone knows the R script to determine the residuals and graph them It would be very much appreciated!

Thank you

checking residuals is much the same for 1way/2way/... anova ... — kjetil b halvorsen, Aug 09 '20 at 19:20
Does this answer your question? [ANOVA assumption normality/normal distribution of residuals](https://stats.stackexchange.com/questions/6350/anova-assumption-normality-normal-distribution-of-residuals) — kjetil b halvorsen, Aug 09 '20 at 19:20

score 0 · Answer 1 · edited Oct 25 '19 at 02:06

0

If you want to check the histogram of residuals:

hist(your_model$residuals)

If in top of that you want to explicitly test for normality:

shapiro.test(your_model$residuals)

But I would more carefully check the plot of standardized residuals vs Fitted values with:

plot(your_model)

edited Oct 25 '19 at 02:06

OTStats

answered Mar 04 '19 at 15:01

glagla

1 Answers1