find the null and alternative hypotheses and what kind of test it is B. Find the P-value C. Determine whether to reject H0 D. Conclusion
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
patients received bare metal stents, and of these,
needed treatment for reblocking within a year. A total of
received drug-coated stents, and
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
level of significance and the
-value method with the TI-84 Plus calculator.
find the null and alternative hypotheses and what kind of test it is
B. Find the P-value
C. Determine whether to reject H0
D. Conclusion
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