Treating circulatory disease:Angioplasty is a medical procedure in which an obstructed blood vessel is widened. In some cases, a wire mesh tube, called a stent, is placed in the vessel to help it remain open. A study was conducted to compare the effectiveness of a bare metal stent with one that has been coated with a drug designed to prevent reblocking of the vessel. A total of5312patients received bare metal stents, and of these,845needed treatment for reblocking within a year. A total of1116

received drug-coated stents, and150of them required treatment within a year. Can you conclude that the proportion of patients who needed retreatment is less for those who received drug-coated stents? Letp1denote the proportion of patients with bare metal stents who needed retreatment andpdenote the proportion of patients with drug-coated stents who needed retreatment. Use the=0.01level of significance and theP-value method with the TI-84 Plus calculator.

Part 1/4

State the appropriate null and alternate hypotheses.

Part 2/4

Find theP-value. Round the answer to four decimal places.

P-value =

Part 3/4

Determine whether to rejectH0

Part 4/4

State a conclusion.

There ------ enough evidence to conclude that the proportion of men with elevated cholesterol levels is greater than the proportion of women with elevated cholesterol levels