multiple comparison test

Hi all, Can anyone help me trying to understand how to do the grouping at the end of the post-hoc procedure in the one way ANOVA? For each kind of test (LSD, Bonferroni, Tukey, Scheffé etc) I can understand the way it calculates the confidence interval and how it check if the means of each...

In a clinical study, I have patient's health condition labeled as grade 1, 2, or 3. Some patients are labeled as "Either 1 or 2" by the doctor, meaning the doctor considers both grade 1 and 2 as valid descriptions of the patient's health condition. When performing say a Kruskal-Wallis test...