Assignment:
A drug company wishes to compare the effects of three different drugs (X,Y,and Z) being developed to reduce cholesterol levels. Each drug is given to six patients at the recommended dosage for six months. The reductions in cholesterol levels is recorded for each patient. The table below presents the results.
|
Drug
|
|
X
|
Y
|
Z
|
|
22
|
40
|
15
|
|
31
|
35
|
9
|
|
19
|
47
|
14
|
|
27
|
41
|
11
|
|
25
|
39
|
21
|
|
18
|
33
|
5
|
Q1. a. Is there enough evidence to indicate a difference in the variances for the three brands of drugs? Assume alpha = .01.
b. What is the p-value for this problem?
c. How much confidence can you have in a decision to reject the null?
d. Is your answer sensitive to alpha? How do you know?
Q2. a. Is there enough evidence to indicate a difference in the means for the three brands of drugs? Assume alpha = .01.
b. What is the p-value for this problem?
c. How much confidence can you have in a decision to reject the null?
d. Is your answer sensitive to alpha? How do you know?
Q3. a. Which of the three drugs perform differently, if any? How do you know?
b. Which one(s) are most effective in reducing cholesterol?
Your answer must be, typed, double-spaced, Times New Roman font (size 12), one-inch margins on all sides, APA format.