G08AKF Example Program Results Mann-Whitney U test Sample size of group 1 = 16 Sample size of group 2 = 23 Data values Group 1 13.0 6.0 12.0 7.0 12.0 7.0 10.0 7.0 10.0 7.0 16.0 7.0 10.0 8.0 9.0 8.0 Group 2 17.0 6.0 10.0 8.0 15.0 8.0 15.0 10.0 15.0 10.0 14.0 10.0 14.0 11.0 14.0 11.0 13.0 12.0 13.0 12.0 13.0 12.0 12.0 Test statistic = 86.0000 Normal statistic = -2.8039 Tail probability = 0.0025 Ranks Group 1 29.5 1.5 24.5 5.0 24.5 5.0 16.0 5.0 16.0 5.0 38.0 5.0 16.0 9.5 12.0 9.5 Group 2 39.0 1.5 16.0 9.5 36.0 9.5 36.0 16.0 36.0 16.0 33.0 16.0 33.0 20.5 33.0 20.5 29.5 24.5 29.5 24.5 29.5 24.5 24.5 Exact tail probability = 0.0020