18.6. Weightlifters. Blood lactate levels were determined in a group of ama- teur weightlifters following a competition of 10 repetitions of 5 differentupperbody lifts, each at ?D% of each lier's single maximum ability. A sample of 17 randomly selected individuals was tested: 10 males and 5' females. The fDllUl-Ving table gives the blood lactate levels in female and male weightlifters, in units of mg! 100 ml of blood: Gender N Blood lactate Female '3' 17.9 8.2 8.7 12.3 12.5 16.? 20.2 Male 10 5.2 5.4 6.7 6.9 3.2 8.? 14.2 14.2 17.4 20.3 Test Hg that blood lactate levels were not different between the two gn ders at the level at = 0.05. Assume that the data, although consisling of measurements of continuous variables, are not distributed normally or variances are possibly heterosoedastic [nonequal variances}. In other words, the traditional ttest may not be appropriate