If m = n, the acceptance region (5.23) can be written as max S2 Y

∆0S2 X

,

∆0S2 X

S2 Y



≤ 1 − C C , where S2 X = (Xi − X¯)

2, S2 Y = (Yi − Y¯ )

2 and where C is determined by

 C 0

Bn−1,n−1(w) dw = α

2 .