a- critical value...

b- z-score.....

A weight loss program claims that program participants have a mean weight loss of at least 10 pounds after 1 month. You work for a medical association and are asked to test this claim. A random sample of 30 program participants and their weight losses (in pounds) after 1 month is listed in the table below. Assume the population standard deviation is 3. At =0.06,do you have enough evidence to reject the program's claim? Complete parts below.

5.4	6	6.7	6.9	7.3	7.8	7.8	8	8.4	8.5
8.9	9.1	9.2	9.2	9.2	9.8	10.1	10.2	10.5	10.6
10.9	11.2	11.5	11.6	11.8	12.4	12.6	12.7	13.7	15.4