what is the interpretation behind the confidence interval in a mann-whitney test or a wilcoxon rank sum test?
Two group of data, symmetric empirical distributions...
I got a result of (3.9, 6.0) for 95% CI (from the computer, i.e. minitab)
However, the difference in medians for both are 24.3-24.4=0.1 (where 24.3=median of A, 24.4=median of B).
Why doesn't the difference in medians included in the 95% CI? And what is the meaning of the CI for this?
Btw, the p-value is 1.708x10^-8