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1 vote
1 answer
514 views

Should I rank my data before doing post hoc Dunn test?

I am trying to compare multiple algorithms using the Friedman test and post hoc Dunn test. I know that we should use the rank of our data before performing the Friedman test, but should we rank the ...
Sajjad's user avatar
  • 11
1 vote
2 answers
875 views

Friedman's test in SPSS gives different results from R and python

I have a repeated measurement of n=452 participants. The Friedman test of SPSS gives df=2, chi-square 36.970 whereas below is the output of R and python. I cannot explain this difference for chi-...
Artemis's user avatar
  • 51
1 vote
2 answers
857 views

Kendall’s Coefficient of Concordance (W) is different when calculate with two formula: SPSS VS python

I used the Friedman test to compare three repeated measures and I use Kendall’s Coefficient of Concordance (W) to get its effect size. SPSS uses this formula: F (from Friedman test)/n_f (k-1), and I ...
Artemis's user avatar
  • 51
3 votes
1 answer
3k views

How to do Friedman test and post--hoc test on Python? [closed]

I know that Python's SciPy library has the function for the Friedman test But, it is not enough as I need more information for posthoc test. So, how I do Friedman test and post-hoc test entirely on ...
Aqee's user avatar
  • 39
11 votes
3 answers
14k views

Friedman test and post-hoc test for Python

In my dataset, I have five (ordinal) groups with an x-amount of measurement. Because homoscedasticity is violated, I performed the Friedman chi-square test to see if there are any statistical ...
Robin Kramer-ten Have's user avatar