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.
473 questions
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Appropriate approach for checking concentration change for 80 substances with n = 3 for three time points
I am relatively new to statistics and would appreciate some guidance on whether my analysis approach is appropriate.
What I have:
I measured concentrations of 80 different substances. There are three ...
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Compare clusters: Kruskal–Wallis test
I performed a clustering analysis on European countries using several continuous variables and the Ward linkage method. Ward produced the highest average silhouette width compared to single, complete, ...
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Should I use ANOVA, MANOVA or Kruskal-Wallis (Or something else?!) trying to show that there is a significant difference between four vignettes? [closed]
I’m quite new to stats and very new to stackexchange so please bare with me.
I have a set of data which I want to analyse to basically see if having piercings makes it more or less likely for someone ...
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How do I use age as a control condition when performing a Kruskal-Wallis-Test?
I have a list of 70 symptoms (results in Likert-scale) I want to compare across disease stages 1,2 and 3. I would like to use age as a control. How do I do this when performing a Kruskal-Wallis-test?
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Welch’s t-test and Kruskal-Wallis for small-sample water quality data with unequal variances and non-normality?
We are testing a water filtration machine designed to clean lake water using one pump and two sequential filters. Our goals are:
To assess whether the machine effectively removes certain chemicals.
To ...
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Non parametric multivariable analysis: effect of two categorical variables on a highly skewed discrete dependent variable
I'm working on a research project examining factors influencing the number of psychotherapy sessions attended. My dependent variable is the number of sessions, which ranges from 1 to 16 and exhibits ...
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Can Kruskal-Wallis test be used in groups of different size? CITATIONS NEEDED
I have 4 samples and used Kruskal-Wallis for comparing the differences. I know from previous posts that Kruskal-Wallis test be used in groups of different sizes BUT I've had a hard time finding a ...
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Which statistical test to use for species microclimate data [closed]
Very new to statistics and I keep going in circles with this!
I need to analyse species microclimate data. I have 7 plant species, each with 3 replicates. For each species I have temperature data over ...
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Kruskal–Wallis test and dependence within groups
I have some data with three groups that I want to compare. I was planning on using the Kruskal–Wallis test because of non-normality.
The data are independent between groups, but not within the groups (...
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Kruskal-Wallis test or other?
I have a data set with three groups of right skewed data. There are only four possible values for each observation: 10, 20,30, and 40. Below is a frequency table for the amount of times each value was ...
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Modelling/Significance testing for a categorical response variable and proportion as an explanatory variable
I am a beginner research student who is trying to model for the first time. I am struggling with figuring the correct model to fit my variables. My results are rather simple, so I'm concerned I may be ...
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Is it a repeated measure? How to allow for this in Kruskal-Wallis test?
I am trying to decide the best way to analyse my data. So I am looking at animals following a veterinary procedure, in which they end up with a small wound on each side of the body. I have 4 different ...
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Consistency check: Is it normal to have a low p-value [duplicate]
I'm using a kruskal-wallis test the check is there is a difference between a different type of groupes, and after getting a significant results i conduct a post hoc tests and i got those low p-values. ...
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Gaining additional information after Kruskal-Wallis by further comparing groups using Wilcoxon? (when two-way ANOVA is not possible)
I have the following experimental set-up, with the numbers being individuals in six groups:
Scenario
Treatment 1
Treatment 2
Treatment 3
A
28
27
27
B
28
28
28
What has been measured once is distance ...
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Kruskal-Wallis H test
In a total population of 4,200 patients, the Q1-Q4 groups are divided based on a continuous variable, tyg. During the baseline analysis, the age of the total population is a skewed continuous variable,...
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