Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [kruskal-wallis-test]

The Kruskal–Wallis procedure is a nonparametric equivalent of one way analysis of variance, used for comparing the location of three or more groups; it extends the two sample Mann–Whitney–Wilcoxon procedure.

The Kruskal–Wallis procedure is a nonparametric equivalent of one way analysis of variance, used for comparing the location of three or more groups; it extends the Mann–Whitney–Wilcoxon, which is used for two samples. It is effectively ANOVA applied to the ranks of the data.

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How to report Kruskal-Wallis test?

As part of the analysis of the data collected from a survey, I was carrying out Kruskal-Wallis Tests between some Likert scale questions and demographics such as firm size and job position. I am using this test instead of One Way Anova since the…
dissertationhelp
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p value <0.05 Bonferroni adjusted but associated descriptive statistics not supportive of difference

I conducted a Kruskal Wallis test on 4 groups of participants' responses on a Likert scale. The likert scale consisted of 5 possible responses. This is from results from a research project I have conducted with physiotherapists in the UK. Example of…
Colin
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Where does the number "12" comes from in Kruskal Wallis formula?

I just want to know.. Where does the "12" in the Kruskal Wallis formula comes from? I hope someone can give me a very good explanation.
user119561
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Is this graph heteroscedastic and if so is Kruskal Wallis test invalid?

I'm new to stats and using GraphPad Prism9 to look at homoscedacticity of a Kruskal Wallis test. Just wondering if this is heteroscedastic because it's cone shaped to me? Also would this mean that the Kruskal Wallis test is void as heteroscadistic…
Naj
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Negative H value in Kruskal Wallis test

I've found exactly one source adressing this (and of course didn't save it). It said that in a Kruskal-Wallis this is a consequence of having a large sample with a lot of ties. Seen as I've got about 50,000 respondents and only an 11 point scale…
Menno
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Kruskal Wallis for binary data

I have collected data from three groups (with different sizes of n). This was done with a test instrument consisting of 9 items, each binary coded (1 = right, 0 = wrong). The results are not equally distributed. I now want to show that there is a…
DaveS
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Test selection for group comparison

We are running a study which investigates platelet aggregation changes during three trimesters of pregnancy and postnatal period. Then, we compare each of these phases to control non-pregnant women. The sample size is 46 including 10 per each…
Brwa Hussein
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Is this a Kruskal-Wallis Test?

This table shows the results of a Kruskal-Wallis test, but I am not sure what the column values represent. I thought the Kruskal-Wallis test statistic is always positive and that the test merely shows whether there is a difference between groups. …
shybr
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Kruskal Wallis H test

I am doing a Kruskal Wallis H test, it looks like I am getting a significant difference between the non-vegetarian group and the vegan group. But not with the semi-vegetarian group and vegan group. This is odd because it looks like the difference…
Melissa Sellies
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Name of multiple comparison post hoc of Kruskal-Wallis test in R agricolae package

Can anyone tell me if the the multiple comparison of Kruskal Wallis test in R Agricolae package is a specific post hoc test? How does it work? If it is a specific post hoc test, what is it? Could anyone recommend me literature? Thank you!
Fjord
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Interpreting whether distributions of scores are similar

As part of a survey I had to conduct Kruskal-Wallis H test. The aim of my study is to understand whether the current waste management practices in households have any effect on people's interests in selecting a centralized waste treatment…
Rahul Ramesh
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Does Kruskal-Wallis need multiple comparisons correction?

I have three groups and aproximately 500 independent variables. I wanted to know if I had to do any multiple comparison correction (e.g. Bonferroni or Benjamini-Hochberg) on the p-values obtained with my KW tests, or directly on the post-hoc results…
user109001
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Kruskal-Wallis or Friedman's test?

I'm really confused about which test to use to test the hyposthesis; "There is no difference in the preference of an exercise programme". Each participant (n=17) attends all three different exercise sessions (aqua aerobics, step aerobics, and…
caro
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Independent Variable groups w/ n=1 possible for Kruskal Wallis?

I am working with clinical data with 7 groups that constitute my independent variable and a not normally distributed dependent variable. I know I have to use KW test to check for significant differences between my groups. The problem is that 3 of…
polis
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Urgent help! What statistical test to use (dental thesis)

The primary aim of this study is to compare tongue posture and function in children with an unilateral posterior crossbite UPCB who were treated with maxillary expansion in combination with orofacial myofunctional therapy (OMT) versus children who…
Mathieu
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