A weight loss program claims that the program participants have a mean weight loss of at least 11 pounds after 1 month. You work for a medical association and are asked to test this claim. A random sample of 30 program participants was selected and it was found that their mean weight loss (in pounds) was 9.8 pounds with a standard deviation of 3.1 pounds. At alpha = 0.05, do you have enough evidence to reject the program's claim? Use the critical value (rejection region) method.

Find the critical values(s)