# friedman test

1. ### Why is Kendall's Tau always so high?

Hi there, I'm using Kendall's Tau to check whether two judges agree on the ranking of some individuals. According to what I have read on the internet*, W>0.5 means that there is at least a moderate agreement between the two judges. The problem is that W is always super high for no reason. W=5...
2. ### Nonparametric Friedman test - repeated measures and repeated subjects

Hi all, I would appreciate some advice on the most appropriate nonparametric test to evaluate the impact on some measures when subsampling my original datasets. Number of subjects: 9 Number of original datasets: 14 (some subjects have multiple sessions; 3 subjects have 2 sessions; 1 subject has...
3. ### Non-parametric Two-way ANOVA

Hi Guys, I wanted to run a TWO-way ANOVA but unfortunately, my variables are non-parametric. I have tried transforming the data but that did not work. I was wondering what the next step was? I was thinking of conducting two separate tests, a Friedman's test as a non-parametric alternative to...
4. ### Friedman's test for ordinal variable

Hello, Could I please get some feedback with regard to whether my thinking below is correct? My participants (n=51) were measured at four time-points participating in various activities. I would like to see whether their participation in each activity changed over time. Participation in each...
5. ### Effect sizes - Friedman's test

Hello, I have a question regarding which measure of effect size to use. For Friedman's test, do I report the effect size when the result of the test is insignificant? For example, Field (2014) only reports the effect size of the post-hoc tests, but not the effect size for Friedman's test. If I...
6. ### Significant Friedman's test but non-significant post-hoc tests

Hello, I am running a Friedman's test because I want to see if there is any difference in my participants' scores across 4 time-points. My sample is n=51. I ran the test and it revealed a statistically significant difference (p = 0.29). Then I conducted post hoc tests to see where the...
7. ### Analysis of different influence factors in a study - method?

Hi everybody, I am an engineer and trying to evaluate the outcome of a study. The participants were asked to rate the visual color match of panel couples on a scale from 1 (poor) to 5 (good). This was done with 50 panel couples and 25 participants. I want to investigate, whether there are...
8. ### Test wanted for comparing algorithms

Study design Suppose I want to compare algorithm runtime performance (measured in seconds) of different algorithms for the same problem type. There are several problem instances for this problem type on which the algorithms are tested and performance is measured. Possible tests As far as I...
9. ### ANOVA? Looking at percentage habitat use (6 different habitats) across four seasons

Hi, I am trying to look at whether habitat use of 6 different habitat types differs across 4 seasons. I have managed to run ANOVA tests but I'm not convinced this is correct. The code I have been using is as follows; an.aov=aov(Month~Heathland) an.aov summary(an.aov)...
10. ### Which analysis for a survey question asking how frequently a group do an activity ?

I surveyed a group of photographers and asked them how frequently they used a particular type of lens for a specific type of photograph. I now want to find out which lens or lenses are the most commonly used for each type of photograph. There were four lens types and five types of photographs...
11. ### Survey on how frequently a group use a particular device: Which analysis methods?

I surveyed a group of photographers and asked them how frequently they used a particular type of lens for a specific type of photograph. I now want to find out which lens or lenses are the most commonly used for each type of photograph. There were four lens types and five types of photographs...
12. ### What to do with unequal sample sizes?

I am working on this time-effect project in which we pulled data at different time points from a big old data set. The issue is that all subjects were sacrificed at different times after treatment. So I have 16 samples at time 1, 10 samples at time 2, and so on. I am going to do Friedman test...
13. ### Planned contrasts in Friedman's ANOVA

Is it possible to investigate planned contrasts in Friedman's ANOVA or is it only possible to investigate pairwise comparisons? Thank you for your help!
14. ### Running non-parametric repeated measures analysis with split file on

Okay so, I'm currently writing up my thesis, and I've got 2 between group variables and 3 within-group variables. I'm not doing a mixed design ANOVA because my data is non-normal (I'm all okay with doing non-parametric). What my main question is, is whether it is okay to run say a...
15. ### Nonparametric/Ranking Data Help!!

Hi all, I am a PHD student attempting to come to grips with an analysis of some recent data. I have a repeated measures design. 220 students were presented with 13 different problem scenarios and then had to indicate who they would seek help from, ranking a list of seven help providers (ie...

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17. ### Non-parametric statistical test with two nominal variables

Hello everyone,:wave: I have the following data: feces density of a carnivore species subdivided according to sex. I am looking for appropriate test suggestions. I have calculated the density according to main habitat types, topography, and road types. To determine if results are...
18. ### Confirmation of correct test for repeated measures of ordinal data: Friedman's Test

Dear Stats Community, I performed an experiment in which I measured the behavioral responses on an ordinal scale (1-4) of a group of non-human animals to a series of auditory stimuli (A,B,C,D). The order of the presentation of the stimuli was randomized, but each animal experienced all...
19. ### I need to do a friedman test

Hi! I am writing my dissertation and have done several experiments. most of the significancy tests have been done by a specialist for statistics but it takes forever to get new results of him and there is only one thing that is missing. I had three identical setups and took samples of each...
20. ### Is the following testable? I think so and have chosen Friedmans test, is it correct?

Hello TS people, Thanks for talking a look at my question/problem, I am new, you can check out my introduction topic on the appropriate forum. I am planning a set of experiments and would like to be able to present them to my Prof. with a sound set of workable statistics. Predator...