Mean = 28

Standard Deviation = 6

User sets out to run a two-tailed test with α = .05. She calculated the mean of the final exam scores to be 29.5 points, from the Spring class of 64 students.

Determine the critical value(s) for Z.

Compare the Z statistic with the critical Z value (that is, "is the Z statistic more extreme than the critical Z?"), and then make a decision about the result of the hypothesis test (do you "reject" or "fail to reject" the null hypothesis?)

Calculate the standardized effect size for this test.