[Bug]: Inverse Rank-Biserial Correlation #3918
Description
JASP Version
0.95.3
Commit ID
No response
JASP Module
T-Tests
What analysis are you seeing the problem on?
Mann-Whitney U-Test
What OS are you seeing the problem on?
Windows 11
Bug Description
I got an inverse Rank-Biserial Correlation.
Group 1 has a mean rank of 447.458 (Sum 123051)
Group 2 has a mean rank of 397.332 (Sum 219327)
It provides a Rank-Biserial Correlation of - .118, despite the correlation should be positive (given the mean ranks)
Expected Behaviour
Positive Rank-Biserial Correlation acc to the mean ranks
Steps to Reproduce
I opened the Independent T-Test Module
Entered my variables and split it by the grouping variable
The descriptives tell me that Group 1 has a higher mean rank than group 2, nevertheless the rank-biserial correlation is negative.
Log (if any)
No response
More Debug Information
No response
Final Checklist
- I have included a screenshot showcasing the issue, if possible.
- I have included a JASP file (zipped) or data file that causes the crash/bug, if applicable.
- I have accurately described the bug, and steps to reproduce it.