Answered: Treating circulatory disease:…

MATLAB: An Introduction with Applications

6th Edition

ISBN:9781119256830

Author:Amos Gilat

Publisher:Amos Gilat

Chapter1: Starting With Matlab

Section: Chapter Questions

Problem 1P

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Question

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 of

5319

patients received bare metal stents, and of these,

848

needed treatment for reblocking within a year. A total of

1122

received drug-coated stents, and

142

of them required treatment within a year. Can you conclude that the proportion of patients who needed retreatment differs between those who received bare metal stents and those who received drug-coated stents? Let

denote the proportion of patients with bare metal stents who needed retreatment and

denote the proportion of patients with drug-coated stents who needed retreatment. Use the

=α0.10

level of significance and the

-value method with the TI-84 Plus calculator.

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