
Hi Leila,
Look at your mean ranks when doing one tailed tests.
If MeanRank1 < MeanRank2 the onesided pvalue is for the leftonesided test. Otherwise if for the Right sided.
The Z statistics numerator is (Min (W1, W2) E(W)) and thus is always negative (if I am seeing it right). Cannot use that to decide if the onesided test is left or right sided.
Best
João
