Fix rank biserial correlation sign for Mann-Whitney U test #476
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Hi, Thanks for opening the PR. Is this linked to a particular GitHub issue/discussion? If not, can you please first open an issue to describe the problem, with minimal code to reproduce the issue? Also, for this PR, please add unit tests to validate the new behavior. Thanks |
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Changed RBC calculation from
rbc = 1 - (2 * uval) / diff.size
to
rbc = 2 * cles - 1
This makes RBC directional and consistent with CLES, so that RBC > 0 when x > y.