one-tailed u_test p value correct?

[ermutarra]

Hi all,

I am using the u_test with my data but the results don't make sense. I have
an X that is clearly greater than Y (I have plotted the two histograms and
it is pretty obvious) but when I do

[pval, z] = u_test(x, y,">")

I get pval=1 and z=5.7970.

Has anybody experienced similar problems with this test????

Thank you very much for your help!!



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