We have a random sample of 30 12^th grade students who can do 25 pushups on the average, with a standard deviation of 9, after completing a special physical education program. Does this value of 25 differ significantly from the population value of 20?

What kind of test can we use?What is the test value?Write down the null and alternative hypothesis.Find the critical value (make sure it is a one-tailed or two-tailed test).Calculate the test statistics.Makethedecision.Calculatetheeffectsize.