All Questions
Tagged with nonparametric anova
26
questions
29
votes
1
answer
57k
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What is the non-parametric equivalent of a two-way ANOVA that can include interactions?
Hi I am trying to find the non-parametric equivalent of a two-way ANOVA (3x4 design) which is capable of including interactions. From my reading in Zar 1984 "Biostatistical analysis" this is possible ...
- 291
28
votes
4
answers
21k
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Is there an equivalent to Kruskal Wallis one-way test for a two-way model?
If the model does not satisfy ANOVA assumptions (normality in particular), if one-way, Kruskal-Wallis non-parametric test is recommended. But, what if you have multiple factors?
- 351
19
votes
3
answers
18k
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A non-parametric repeated-measures multi-way Anova in R?
The following question is one of those holy grails for me for some time now, I hope someone might be able to offer a good advice.
I wish to perform a non-parametric repeated measures multiway anova ...
- 21.8k
18
votes
5
answers
5k
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Checking ANOVA assumptions
A few months ago I posted a question about homoscedasticity tests in R on SO, and Ian Fellows answered that (I'll paraphrase his answer very loosely):
Homoscedasticity tests are not a good tool ...
- 2,211
6
votes
4
answers
3k
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Is there a non-parametric form of a 3-way ANOVA?
I am currently in the process of writing a publication about the home range of cat shark species in South Africa. However, I am currently struggling with how to create an interaction model of shark ...
- 61
0
votes
2
answers
256
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Is there an assumption-free ANOVA?
ANOVA presupposes a normal distribution and equal variance. Kruskal–Wallis (non-parametric ANOVA) assumes that all population distributions are the same (except their parameters).
I'd like to know if ...
- 1,220
19
votes
2
answers
40k
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How to run two-way ANOVA on data with neither normality nor equality of variance in R?
I am working on my master thesis at the moment and planned on running the statistics with SigmaPlot. However, after spending some time with my data I came to the conclusion that SigmaPlot might not be ...
- 191
6
votes
1
answer
9k
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Friedman's test and post-hoc analysis
I am carrying out a statistical analysis for my research. I am using a Friedman's test with post hoc analysis. At present I am using the function ...
- 61
11
votes
3
answers
26k
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Non-parametric test equivalent to mixed ANOVA?
I have an experiment with two groups under different conditions where a single dependent variable is measured repeatedly at multiple times. It seems the right parametric test to use here is two-...
- 1,153
9
votes
2
answers
10k
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Non-parametric for two-way ANOVA (3x3)
My dependent variable is continuous, non-normal (skewed left according to Shapiro-Wilk test). I have two independent variables (treatment group by colour, food type). There are 3 levels within each ...
- 101
8
votes
2
answers
4k
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General approach for non-parametric two-way ANOVA
Apologies for the almost text-book like question.
I have a 2x2 design with fixed categories and a continuous response variable.
If the variances are equal between groups (Bartlett test) and ...
- 373
4
votes
2
answers
1k
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Can I use multiple regression on a ranked response variable as a significance test for multiple covariates?
This blog post illustrates the relationship between inference tests on groups (t-test, ANOVA, etc.) and equivalent linear models. It also claims that for reasonable sample size, regression of a ranked ...
- 1,138
9
votes
4
answers
6k
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Multi-way nonparametric anova
I have to analyze a factorial design with five factors (one of them nested in another one) and numeric responses. I would like to perform a nonparametric ANOVA, but of course I can't use neither ...
Stefania
8
votes
2
answers
62k
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Non-parametric alternative for 2-way ANOVA [duplicate]
Suppose I have 2 independent variables whereby normal distribution can be assumed.
However, there is unequal variance and interaction between the two factors is unknown.
Could someone suggest an ...
- 101
7
votes
2
answers
5k
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Nonparametric alternative to ANOVA for testing the difference between several brand preferences
I have collected a data from about 200 customers on their brand preference of 5 international fast food chain shops. Each customer was asked to rank all the 5 brands from highest to lowest (5 for the ...
- 3,605