All Questions
7
questions
1
vote
2
answers
356
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
1
answer
107
views
Calculate fraction of multiple tests for which the null hypothesis was rejected
Consider a test (e.g., a permutation test) that tests, at the individual level, if a binary event occured or not.
A paper that I was recently reading, for example, tested whether or not a pair of two ...
- 3
0
votes
0
answers
147
views
Kruskal Wallis test gives significance, multiple comparision table doesn't
I'm comparing physico-chemical properties of 8 different kefir samples like viscosity at different storage times. I have 4 viscosity measurements for each group. When I conduct Kruskal Wallis test; ...
- 1
3
votes
0
answers
446
views
Multiple comparisons between two groups (non-parametric)
Update Added more details about the Experimental setup.
My experiment comprised two groups, control (N=25) and experimental (N=26). Each participant belonged to one group. Their performance has been ...
- 123
0
votes
1
answer
90
views
How to interpret results of differences of differences in interactions?
I have a dataset composed of 2 factors of several levels each (i.e. exercise[A-B-C] x muscle [1-2-3-4-5-6]. I'm interested on the effect of the different exercises (A,B,C) on the muscle activation ...
- 11
2
votes
1
answer
3k
views
what test to use for comparing count data across multiple groups
I have five groups of students and 40 in each. And we counted the number of references spelling mistakes in their homework. We would like to compare to see if there exists any groups differences in ...
- 229
0
votes
0
answers
398
views
Kruskal-Wallis post hoc comparisons different results in different software used
I'm having some trouble analyzing my data because when I use StatSoft Statistica and run a Kruskal-Wallis, I get one set of values for multiple comparisons, but when the same analysis is run in XLSTAT ...
- 81