A researcher for a cereal company wanted to demonstrate the health benefits of eating oatmeal. A sample of 9 volunteers was obtained and each participant ate a fixed diet without any oatmeal for 30 days. At the end for the 30 day period, cholesterol was measured for each individual. Then the participants began a second diet except that they added 2 cups of oatmeal each day. After the second 30 day period, cholesterol levels were measured again and the researcher recorded the difference between the tow scores for each participants. For this sample, cholesterol scores averaged M0 =16 points longer with the oatmeal diet with SS = 538 for the different scores. a. Are the data sufficient to indicate a significant change in cholesterol level? Use the two tailed test with a = .01. b. Compute r2 the percentage of variance accounted for by the treatment, to measure the size of the treatment effect. c. Write a sentence describing the outcome of the hypothesis test and the measure of effect size as it would appear in a research report.