Table 4.

Critical difference, |p₁ − p₂| for given power level, γ, at different sample sizes, n, type I error, α, δ = 0.05 and number of ROIs R = 21

α	γ = 0.60			γ = 0.80			γ = 0.90
	n = 20	n = 25	n = 30	n = 20	n = 25	n = 30	n = 20	n = 25	n = 30
0.01	0.214	0.172	0.142	0.240	0.191	0.166	0.262	0.206	0.180
0.05	0.137	0.120	0.111	0.174	0.148	0.136	0.188	0.162	0.151
0.10	0.119	0.110	0.097	0.149	0.132	0.120	0.176	0.150	0.142

Standard errors of entries in the table range between 5% and 50% of the entries.