4

4. Two different weight loss programs are being compared to determine their effectiveness. Ten men were assigned to each program (that is, a total of 20 men altogether). Their weight losses (in lbs). after a period of time, are recorded below. We are interested in determining which, if any, of the diets is more effective in terms of average weight loss. Assume weight loss for each diet to be normally distributed. 3.4 10.9 2.3 7.8 0.9 5.2 2.5 10.5 7.1 Diet 2 11.9 13.1 11.6 6.8 6.8 8.8 12.5 8.6 115 10.3 Carry out an appropriate test using a signicance level of 0.10