G08AHF 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 Approx. tail probability = 0.0025 There are ties in the pooled sample Exact tail probability = 0.0020