This video demonstrates how to calculate the effect size for a Mann-Whitney U test using SPSS and Excel. Two different effect size calculations for the Mann-Whitney U test are reviewed.
thanks Doctor, it's clear and in a simple way. I have one question dose the difference in the number of observation of two groups has effect on the sum of rank value ?
Hi! I was wondering; which effect size is this? I am looking to calculate the Hodges-Lehmann estimate for the median difference. Is this than the correct way?