Wilcoxon matched pairs signed ranks test
- Rank the differences from the smallest to the
largest, ignoring signs and omitting 0
differences
Patients 1 2 3 4 5 6 7 8 9 10
Drug score 19 11 14 17 23 11 15 19 11 8
Placebo score 22 18 17 19 22 12 14 11 19 7
difference - 3 - 7 - 3 - 2 1 - 1 1 8 - 8 1
rank 6.5 8 6.5 5 2.5 2.5 2.5 9.5 9.5 2.5