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Can I use the Kruskal-Wallis test for measures on the same animal before and after a treatment has been applied

In my experiment I have 3 treatment groups. Behaviours are scored for each subject (while they are isolated) before and after the treatment is applied. I thought that the Kruskal-Wallis test could ...
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Is Serial Independence, an assumption in Friedman and Kruskal Wallis Tests

I understand that Friedman and Kruskal Wallis are non-parametric tests to see if different groups come from same population. I also gather from here that these tests are used to test for seasonality....
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18 views

Friedman and Kruskal

I have a data with 4 groups and multiple variables with measured values. my groups are ES, EP, PP and PS. ES and EP are associated and PP and PS are too. So i would like to compare my groups in non ...
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46 views

Which statistical test for my data?

(EDIT: question simplified) This is a basic question, since I am new to data analysis and statistics. I am carrying out a 2X3 factorial survey where participants are presented with a series of ...
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195 views

Should I use one Friedman test or two Kruskal-Wallis tests on small sample?

I am looking at concentrations at 3 sites over 4 years, with 4 samples at each site. Because of the small number of samples, I believe I should use non-parametric statistical tests. My question is: ...
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188 views

Is there a risk in performing Kruskal-Wallis test instead of Friedman test?

My understanding is that the Friedman test is usually performed on unreplicated blocked data. A matrix containing such data would look as follows: ...