Hello everyone,
I'm currently working on a scientific article where I'm investigating the influence of geographical origin on the fatty acid composition of olive oil. Specifically, I have collected 9 samples from each of 4 different geographical origins. My goal is to determine if there are significant differences in the fatty acid composition among these 4 origins.
In my previous research, I often used ANOVA followed by the Tukey (HSD) test to assess differences among groups. However, in my current study, I'm encountering situations where the assumptions of normality and homogeneity of variance are not met for my data.
To address this issue, I've been considering non-parametric tests. I've come across suggestions to use the Kruskal-Wallis test, but I'm unsure about which post-hoc test to use in conjunction with it.
Could anyone provide guidance?
