Table 3.

Estimated power (%) of the WMW and FP tests. The FP test uses the variance estimator based on formula (2). X ~ Logistic(0,1), Y ~ Logistic(μ_y,s_y). μ_y is set to 1, 1.2 and 0.8, respectively for the three s_y at m = 30 and 2, 2.4 and 1.6, respectively for the three s_y at m = 10 to achieve a comparable level of power.

sy	n = m		n = 2m		n = 4m
	WMW	FP	WMW	FP	WMW	FP
normal approx., m = 30
1	57	59	71	72	79	79
2	38	38	49	57	58	75
0.5	60	59	71	64	77	67
permutation, m = 30
1	58	58	71	71	79	78
2	39	37	49	55	58	73
0.5	60	58	71	63	77	65
permutation, m = 10
1	64	66	80	79	87	84
2	43	44	59	64	70	80
0.5	66	66	79	72	85	73