All Questions
28
questions
0
votes
0
answers
80
views
Non-Parametric Two Way Within-Subjects ANOVA
I have a dataset with 4 individuals that are measured twice in each of the 5 groups (so in total 40 observations).
Subject
ID
Group
Value
1
1
A
45
1
2
A
62
1
1
B
70
1
2
B
37
...
...
...
...
4
2
...
- 1
3
votes
1
answer
117
views
Nonparametric way to perform ANOVA of linear mixed model for small sample and power calculation
I have a small data where there are 3 groups (A,B,C) and 5 participants from each group. All of those participants are measured 6 times on each of 7 different exams, so each participant get 6*7=42 ...
- 77
0
votes
0
answers
39
views
Data is not normal, want to test for interaction too Any non-parametric test? [duplicate]
I have a sample size of $310$ individuals that comprises samples collected along the elevation gradient and at different times. I want to see how the variables differ along the elevation, and with ...
- 73
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
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
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
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
2
votes
0
answers
51
views
Nonparametric ANOVA for simulated data
I have some simulated data and I want to test whether "group" has an effect. The data are from a Weibull distribution. because the data are simulated, I can determine sample size, however ...
- 469
0
votes
0
answers
21
views
Which test when I have paired observations in more than two treatments?
I have doubts on which test I should use when I have measurements on the same individuals under more than 2 different conditions.
I have a sample of rats, on which was measured the effect of different ...
- 139
0
votes
0
answers
211
views
How does imperfect stripping affect Aligned Rank Transform ANOVA?
I have tried using ART ANOVA (ARTool) recently for two-way analyses, but I keep getting the warning that ART may not be appropriate because "F values of ANOVAs on aligned responses not of ...
- 1
3
votes
2
answers
975
views
Does aligned rank transform ANOVA require normally distributed data?
Initially, I wanted to do a two-factorial (4x3) repeated measures ANOVA in order to analyse my data.
To be more precise, I do have two factors with factor1 having 4 levels (A, B, C, D), factor2 having ...
- 31
0
votes
1
answer
339
views
Trying to use R nparLD to test for between group variation in repeated measures
I am trying to determine if my subjects differ for a specific variable by sex. I have tried using nparLD but it only tests if my individuals differ between trials, not if there is variation between ...
3
votes
0
answers
608
views
What does it mean when F values of ANOVAs are not all ~0?
I am running an aligned rank transform ANOVA (a non-parametric ANOVA for an ordinal DV). In my data there are 3 factors and one ordinal DV.
When I create the model:
...
- 319
0
votes
0
answers
38
views
Which test to use? Independent data or not?
What I have is a cross section of a bone divided in 60 equal slices. These 60 slices form 4 groups of 15 slices each corresponding to the 4 anatomical orientations (anterior, lateral, posterior and ...
- 1
0
votes
1
answer
129
views
How to find if the means of multiple groups are significantly different when the data is of non-normal distribution: Kruskal-Wallis?
I have dive data from ten shark tags. The tags recorded depth every 10 seconds while at liberty and returned a combined total of >900 k depth records. I would like to see if there is a significant ...
- 113