**Re: choosing the right statistical test for comparing data, when do you use which tes**

Hello,

i checked out the Dunn's test and have an extra question. there are several options available to adjust p-values for multiple comparisons (in R at least, whioch I use for my statistics), would one of these options be the better choice, or doesn't it really matter for my kind of data??

**"bonferroni"** the FWER is controlled using Dunn's (1961) Bonferroni adjustment, and adjusted p-values = max(1, pm).

**"sidak"** the FWER is controlled using Šidák's (1967) adjustment, and adjusted p-values = max(1, 1 - (1 - p)^m).

**"holm"** the FWER controlled using Holm's (1979) progressive step-up procedure to relax control on subsequent tests. p values are ordered from smallest to largest, and adjusted p-values = max[1, p(m+1-i)], where i indexes the ordering. All tests after and including the first test to not be rejected at the alpha/2 level are not rejected.

**"hs"** the FWER is controlled using the Holm-Šidák adjustment (Holm, 1979): another progressive step-up procedure but assuming dependence between tests. p values are ordered from smallest to largest, and adjusted p-values = max[1, 1 - (1 - p)^(m+1-i)], where i indexes the ordering. All tests after and including the first test to not be rejected at the alpha/2 level are not rejected.

**"hochberg"** the FWER is controlled using Hochberg's (1988) progressive step-down procedure to increase control on successive tests. p values are ordered from largest smallest, and adjusted p-values = max[1, p*i], where i indexes the ordering. All tests after and including the first to be rejected at the alpha/2 level are rejected.

**"bh"** the FDR is controlled using the Benjamini-Hochberg adjustment (1995), a step-down procedure appropriate to independent tests or tests that are positively dependent. p-values are ordered from largest to smallest, and adjusted p-values = max[1, pm/(m+1-i)], where i indexes the ordering. All tests after and including the first to be rejected at the alpha/2 level are rejected.

**"by"** the FDR is controlled using the Benjamini-Yekutieli adjustment (2011), a step-down procedure appropriate to depenent tests. p-values are ordered from largest to smallest, and adjusted p-values = max[1, pmC/(m+1-i)], where i indexes the ordering, and the constant C = 1 + 1/2 + . . . + 1/m. All tests after and including the first to be rejected at the alpha/2 level are rejected.

Kind Regards

Joachim