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.
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Appropriate way to correct for multiple comparisons in this case
I am trying to compare the performance of an optimisation algorithm on different objective functions. The functions can vary in their form (4 different types) and dimension. I would like to first ...
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How to compare three groups of patients if one group is normally distributed but the other two are not?
Retrospective study involving three groups of patients. Group 1 are patient's diagnosed with sepsis. Group 2 are patient's diagnosed with a localized infection. Group 3 are "healthy" ...
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Underlying model ANOVA and Kruskal-Wallis
Is the underlying model for one way ANOVA ($Y_{ij}= u + t_i + E_{ij}$) the exact same for Kruskal-Wallis test since KW is the non-parametric anova equivalent or does it have a different model?
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What Statistical test to use on my project?
I am very confused about what kind of statistical test to use in RStudio on my project,
I have measured the mean salinity for 3 levels of population density (low medium and high) across 6 months (...
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Kruskal-Wallis with unbalanced classes and assumption of normality
Edited
I want to better understand:
how to appropriately approach a significant test with largely unbalanced classes
appreciate the "story" that a statistical tests support
Situation:
I ...
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ANOVA vs Kruskal Wallis - Small sample size
I have data from an experiment comparing plant weights for 4 independent treatment groups. The data seem to be normally distributed (I have been warned about using statistical tests for normality). ...
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Welch ANOVA for Comparisons of Elevation & altered Sediment Accretion of Sea Ecosystems: Large DEM with no normal distribution & heterogeneity
I am investigating the elevation characteristics and sediment accretion effects of two distinct ecosystems within the Wadden Sea, impacted by the bioinvasion of one species (ecosystem one) and ...
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Is Kruskal-Wallis really a good test of stochastic superiority?
After much reading/googling, I reached the conclusion that the Kruskal-Wallis test (K-W) is a test of stochastic superiority (or, equivalently, of stochastic equivalence). Rejecting the null implies ...
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Statistical approach to explain variance in different types of soil health data (organic material decomp vs lab based measures)
Seeking feedback and guidance on the statistical approach to explain variance in soil health data for a scientific paper on the sensitivity of organic material (teabag) decomposition to commonly used ...
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I would like to perform a Kruskal-Wallis test in Jamovi [closed]
My problem is that I have data of sexual assertiveness (7 point Likert-scale, SAQ) and relationship satisfaction (5 point Likert-scale, RAS) but I would like to divide the sexual assertiveness ...
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Statistical test for small non-parametric dataset with more than 2 dependent groups
I’m trying to figure out the most appropriate test to use for a small water quality dataset (n = 10 sampling visits at 6 river sites, upstream to downstream) with the following characteristics:
-not ...
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When to use an adjustment method for Kruskal-Wallis + Dunn's and which method?
I need to do multiple pairwise comparisons among 5 groups (Treatment 1, Treatment 2, Treatment 3, Positive Control, Negative Control) for different tests and times. Each group has $10$ individuals, ...
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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 ...
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I'm struggling to find which is the right statistical test to use?
I have two variables: cell death and diet, but on the diet variable I have several groups that I want to compare. I was thinking of doing multiple Mann-Whitney tests, but that would be very time ...
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Kruskal wallis and posthoc test verification?
I am trying to run a kruskal-wallis test on my dataset.
Dataset is given below:
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