I am wondering how I can check the normality of residuals (I’m using R).
I have a between subject factor (experiment) and two within factors (day and treatment). What I am looking for is the difference of percentage between experiments. ID is the individuals tested for.
I used the rstatix package with the code but the code doesn’t include residual:
anova_test(data = data, dv = percent, wid = ID, between = experiment, within = c(day, treatment))
And this one from the afex package also gives the same results with no residuals:
aov_car(percent ~ experiment * day * treatment + Error(ID/(day * treatment)), data = data)
Any help with how to write a code in any package that would give me the residuals is greatly appreciated!