Four individuals with high levels of cholesterol went on a special diet. Their total cholesterol levels before and after the diet are given below. Was there a significant change in cholesterol level using the .05 significance level?

Participant Before After J.K. 287 255 L. M. M. 305 269 A.K. 243 245 R.O.S. 309 247

SS = 2072, Sample mean = -32

Difference score = After - Before

What is the null hypothesis? a. Cholesterol levels before and after the diet will be the same b. Cholesterol levels after the diet will be different than before the diet c. Cholesterol levels after the diet will be lower than before the diet d. Cholesterol levels after the diet will be higher than before the diet

What is the research hypothesis? a. Cholesterol levels before and after the diet will be the same b. Cholesterol levels after the diet will be different than before the diet c. Cholesterol levels after the diet will be lower than before the diet d. Cholesterol levels after the diet will be higher than before the diet

What is the comparison mean? a. 0 b. 254 c. 286 d. -32

What is the comparison standard deviation? Show your work a. 0 b. 13.14 c. 172.67 d. 690.67

What is/are the cutoff(s)? a. 1.96 b. 2.776 c. 3.182 d. -2.353

What is the t-score for the sample score? Show your work a. 0 b. -1.41 c. -2.44 d. -32

What is your conclusion for this hypothesis test? a. reject the null b. accept the research hypothesis c. accept the null d. fail to reject the null

Provide an interpretation of your findings.