WMWssp                  Sample size calculation for the
                        Wilcoxon-Mann-Whitney test.
WMWssp_maximize         Maximizing power for a given Type I error rate
                        and prior information x and y
WMWssp_minimize         Minimizing samplesize for a given Type I and II
                        error rate and prior information x and y
WMWssp_noether          Sample size calculation for the
                        Wilcoxon-Mann-Whitney test using the Noether
                        formula
