Dr Mircea Zloteanu 🌺🌞🍃#statstab #314 One-sided significance tests
Thoughts: Directional tests are more complex than would initially seem. Here is one view on their proper use.
Mark Rubin - One-Sided Tests
In this paper (Rubin, 2022), I make two related points: (1) researchers should halve two-sided p values if they use them to make directional claims, and (2) researchers should not halve their alpha level if they're using two one-sided tests to test two directional null hypotheses.