Is there a statistically significant difference in mean cholesterol measured at Exam 1 and Exam 2 of the hypothetical study? Among n=15 randomly selected participants, the mean difference was -15.5 units and the standard deviation was 22.8 units. Differences were computed by subtracting the Exam 1 from Exam 2 value. What kind of an outcome is this? What kind of a sample is this? Set up the null and research hypotheses Select the test statistic Set up the decision rule Compute the test statistic using Excel What is your conclusion? rhrbensrv