1.

The data in Table 1 shows the body fat percentages of several men and women who participated in a tness challenge. Each of them performed unsupervised aerobic exercise or weight training (or both) about three times per week for a year. Then, they were measured once at the end of the year. The researcher believes that males will have lower body fat percentages compared to females afterthe same period of exercise. Test this claim using a 2 15. 22 lb 21.7 26 12 23.2 A service company is classified as small if the number of its employees is at most 200, and its classified as big otherwise. Profit in sales of services, such as training and consulting, is classified as either low or high. A sample of 200 service companies produced the following contingency table: Profit Level Size of Company Small Big Low service profit 30 63 High service profit 75 32 Test whether the size of the service company is independent of the level of profit in sales of services at the .05 level of significance