All Questions
Tagged with nonparametric anova
154
questions
2
votes
1
answer
125
views
Fisher Z transformation still not normal
I have 18 different groups that I need to compare. I used the raw values from a neuroimaging file to represent synchronization between two brain regions (which ranged from 0 to 1) and Fisher Z ...
- 21
6
votes
1
answer
589
views
Alternative to Friedman Test in R
I am trying to run a Friedman Test in R with a repeated measure, however, my data do not qualify as an unreplicated complete block design. I am wondering what ...
- 75
0
votes
0
answers
58
views
Non parametric equivalent to a mixed ANOVA?
I have some data from a trial where I have two groups of patients (20 with ongoing disease and 20 without disease).
Both groups have some continuous data at three time points from a subjective outcome ...
- 1
0
votes
1
answer
429
views
Testing for normality of difference between pre-post scores
I'm currently trying to decide what test to run on SPSS for my data. I am comparing the effects of 3 different interventions on trauma scores. I have both pre and post-scores.I have created a ...
- 1
2
votes
1
answer
70
views
Alternatives to ANOVA to find differences between three groups?
So my data is looking at the incidence of emotions within therapy sessions. I am looking at three groups that I suspect have different pattern across several emotions
Group 1 n=36
Group 2 n=12
Group 3 ...
- 21
1
vote
0
answers
109
views
Trouble interpreting Friedman Test for 3-way repeated measures ANOVA
I would like to use a Friedman Test as a non-parametric alternative to a 3-way ANOVA in RStudio. I would like to measure how 'cl_conc' (Response Variable) is affected by 'soil_type' (Fixed Effect #1 - ...
- 35
1
vote
1
answer
241
views
Which statistical test should I use if the assumptions of a 2-way ANOVA are not met?
My study design consists of two factors (one with 2 levels, the other with 6) and a continuous response variable. In order to analyze the influence of both factors on the explanatory variable I built ...
- 441
1
vote
1
answer
644
views
ANOVA vs Kruskal Wallis
I understand that ANOVA is a parametric test while Kruskal Wallis is a non-parametric test. My dataset is not normally distributed but heavily skewed (Skewness: 2.5, Kurtosis: 26.1).
Because of that, ...
- 53
2
votes
2
answers
294
views
What should be normally distributed for a two-way repeated measures ANOVA? R
When running a two-way repeated measures ANOVA, should:
A) the independent varibles be normally distributed?
B) should the scores between the variables be normally distributed?
Overall: should the ...
- 781
1
vote
1
answer
1k
views
How to do pairwise comparisons for Kruskal Wallis test?
If the null hypothesis in the Kruskal Wallis test is rejected, How can we perform pairwise comparisons? Can we apply Dunnett's Test for that?
- 11
1
vote
0
answers
46
views
State-of-the-art nonparametric $k$-way ANOVA allowing heteroscedasticity
QUESTION: Can you recommend a nonparametric version of a multiway ANOVA that is also robust in the absence of homogeneity of variances? So, this is what I am looking for:
(1) Nonparametric ANOVA (no ...
- 789
2
votes
1
answer
395
views
Experience with Kruskal-Wallis versus Zero-Inflated Kruskal-Wallis as nonparametric alternative to one-way ANOVA
I have a data set of 1 categorical predictor (4 levels) and one non-negative continuous response variable (listed as "aphidleaf in histogram). The response variable is not count data and the ...
- 101
1
vote
2
answers
246
views
Nonparametric mixed-design ANOVA
I have an experiment design with one "within subject" factor and one "between-subject" factor. So I have to use mixed-model ANOVA, but empirical distributions are not approximated ...
- 13
1
vote
1
answer
60
views
alternative to ANOVA or simplifying approximations for multi-factor,, batch design with binomial data (advanced beginner)
this is my first post. I did already read various didactic materials and related posts here, but still had trouble figuring this one out. Sorry this is so long but I am trying to be as specific as ...
- 23
6
votes
4
answers
3k
views
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