Directions:
• Neatly write your responses in the spaces provided. Use a blue or black pen. Don’t write
in the margins.
• Remember to complete the submission information on every page you turn in.
Free Response: 2 questions, 52 points, 30 minutes
1. Ace Pharmaceutical has developed a drug that it believes will help lower
cholesterol and blood pressure at a significantly greater rate than fish oil.
Researchers wish to test the new drug and compare the results to those of fish
oil and of a placebo. A total of 300 volunteers suffering from hypertension and
high cholesterol will participate in the study.
A. Explain how you would carry out this test in a completely randomized
experiment. (12 points)
B. Explain carefully how you will ensure that the experiment is random. (6
points)
C. Explain how you could use blocking to modify the design from part A. Be
sure to state why you chose the blocking method you did. (6 points)
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