[R] Assumptions ANOVA

Jim Lemon drj|m|emon @end|ng |rom gm@||@com
Sat Jun 29 09:02:21 CEST 2019

Hi Eleftheria,
If a non-parametric test doesn't sink your preferred hypothesis, it
can offer some peace of mind with regard to scrupulous reviewers. If
it does, it is wise to ponder the reliability of your results.


On Fri, Jun 28, 2019 at 10:34 PM Eleftheria Dalmaris
<edalmaris using gmail.com> wrote:
> Dear all,
> I need to run the following ANOVA
> b <- aov(y ~ a +b*(factor(a)/b) + c + d + e)
> I'm checking the assumption of the normality of the residuals and then the
> Levene's Test for Homogeneity of Variance. I first transform my data so the
> normality assumption is met, but if I do that the Homogeneity of Variance
> test is failing to be met. If I transform them again for the Levene's Test
> to be OK, then the normality assumption is not.
> Is one of those two test more important than the other? Both of those
> assumptions should be met?
> Is it bet to choose a kruskal.test and not an ANOVA since I'm facing those
> kinds of issues?
> Thanks a lot,
> Eleftheria
>         [[alternative HTML version deleted]]
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