Wilcoxon signed-rank test

	A	B	D	E	F
1	post	pre	T+	37.5	7
2	86	88	T-	28.5	4
3	71	77	T=min[T+,T-] i.e. x,V	28.5
4	77	76	n (exclude ties)	11
5	68	64	x bar	33
6	91	96	sd	11.24722
7	72	72	Z	-0.40010
8	77	65	p (2-tail)	0.68908
9	91	90
10	70	65	sd* (corected for ties)	11.21940	continuity correction
11	71	80	Z* (corected for ties)	-0.401091	0.356525
12	88	81	p* (2-tail)	0.688353	0.721447
13	73	72
14				x bar	med.
15			pre	77.1667	76.5
16			post	77.9167	75
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