All Questions
Tagged with nonparametric anova
154
questions
0
votes
0
answers
12
views
When is Tukey post hoc test result identical to Games Howell post hoc test for Welch ANOVA?
In what situations is the Tukey post hoc test identical to the Games Howell post hoc test? I have an ANOVA analysis where HOV is violated and I have a statistically significant Welch ANOVA result. I ...
- 321
0
votes
0
answers
79
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
1
vote
0
answers
57
views
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 ...
- 11
0
votes
0
answers
39
views
Non parametric tests for 2 way anova and linear model? [duplicate]
My dissertation is due very soon and I have only just realised a large mistake in my work. I misread the normality test I used, which actually showed non normal data- but I still have homogeneity of ...
- 1
3
votes
1
answer
114
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
34
views
What test do I use when comparing multiple dependent groups that are non-parametric?
Basically, I am comparing outcomes in a variable that applies to everyone in a field to each subcategory of the group (e.g., average annual pay for all nurses versus annual pay for all of the ...
- 1
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
1
vote
2
answers
341
views
SIgnificant ANOVA but not significant post hoc ... what can I do?
I am analyzing some IHC data on the density of cells in two brain regions(factor 1) in two closely related species(factor 2). My data is composed of an n of 6 for each species and is not normally ...
0
votes
0
answers
30
views
Anova violates normality assumption for error data
I have a 2 x 2 repeated measures ANOVA (N = 51) with Error Rate data as the dependent measure. The error data violates the normality assumption, even when outliers are removed. I have looked at the ...
- 113
1
vote
1
answer
109
views
OLR for non-normal continuous dependent variable with two categorical independent variables?
ID
Sex
Surface
B1
1
female
UN
1255
2
female
UN
542
3
female
UN
818
1
female
UN
274
2
female
UN
261
3
female
UN
314
1
female
UP
552
2
female
UP
548
3
female
UP
721
1
female
UP
431
2
female
...
- 11
2
votes
1
answer
170
views
Can ANOVA suffice for comparing mean of percent/proportion data?
I've been handed off some data to analyze and I'm looking for something simple and straightforward. The 1 response variable/dependent variable is average percent mortality from 7 treatment groups (...
- 101
4
votes
1
answer
129
views
Kruskal-Wallis as a non-parametric alternative to 2-way ANOVA?
I'm a master student currently working with taxonomy and cultivation of wild edible mushrooms. In my experiment, I'm evaluating the effect of 4 distinct solid culture media and 4 temperatures on the ...
- 41
5
votes
2
answers
286
views
How to compare more than two groups of continuous, not-normally distributed values?
I'm currently analyzing the age variable in a dataset of all italian phyisicians (~470,000 obs) and I'm trying to check if age is significantly different between three groups defined by another ...
- 151
0
votes
0
answers
66
views
Comparing non-normal data between three groups
I am analyzing a dataset, where I have 3 categories (independent variable), and one continuous value (dependent variable). I am studying if the continuous value is significantly different between the ...
- 21
1
vote
1
answer
132
views
Performing ANOVA on bounded variables between 0 and 1
I had planned to perform a 3 x 2 repeated measures ANOVA before I realized that all the variables are distributed in a bimodal, U-shaped distribution where 0 and 1 are the modes. The high occurrence ...
- 165