Studentized Wilcoxon Rank-Sum Statistic
This function returns a studentized version of Wilcoxon's rank sum statistic.
StudentWilcoxon(y, tr, tl, ...)
As Chung and Romano (2013) show, using the studentized rank sum as a permutation test statistic yields an asymptotically valid test of the "weak null" that responses are equally likely to be higher under treatment and control.
Chung, E. and Romano, J. P. (2013) Exact and asymptotically robust permutation tests. Annals of Statistics, 41, 484-507.