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Clinical Trials of Lipitor Lipitor (atorvastatin) is a drug used to control cholesterol. In clinical trials of Lipitor, 94 subjects were treated with Lipitor and 270 subjects were given a placebo. Among those treated with Lipitor, 7 developed infections. Among those given a placebo, 27 developed infections. We want to use a 0.05 significance level to test the claim that the rate of infections was the same for those treated with Lipitor and those given a placebo.

a. Identify the null and alternative hypotheses

b. What is the significance level?

c. Calculate the test statistic (Reminder: do not round intermediate steps. Round your final answer to 2 decimal places)

d. Determine the p-value.

e. What is your decision about the null hypothesis?

f. Write a conclusion that addresses the claim.