A fitness trainer claims that high intensity power training decreases the body fat percentages of males. The table shows the body fat percentages of 7 males before and after 10 weeks of high intensity power training. At a=0.05, is ther enough evidence to support the trainer's claim? Male 1 2 3 4 5 6 7 Before 23.3 22.0 19.0 23.0 21.2 21.8 23.4 After 18.2 22.2 19.0 19.6 18.0 17.5 19.6