Re: interpreting wilcoxon output confusion

Posted by jpmaroco on Feb 25, 2011; 9:20pm
URL: http://spssx-discussion.165.s1.nabble.com/interpreting-wilcoxon-output-confusion-tp1069388p3400825.html

Hi Leila,
Look at your mean ranks when doing one tailed tests.
If MeanRank1 < MeanRank2 the one-sided p-value is for the left-onesided 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 one-sided test is left or right sided.
Best
João