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A group of doctors published an article in the New England Journal of Medicine. In the article they revealed ne findings ofa study to determine if there is a difference in survival rates for men who undergo surgery for ocalized ssigned 731 men with localized prostate cancer to radical prostatectomy or observation. During the years of ollow-up, 245 of 367 (66.8%) assigned to surgery survived for at least 5 years and 223 of 364 men (61.3%) ssigned to observation survived for at least 5 prostate cancer and those who are treated with observation only. The researchers randomly years. a) Construct and interpret a 99% confidence interval for the difference in the true proportion of men like these that would survive for at least 5 years after receiving surgery and the proportion that would survive for at least 5 years when only being observed. b) Does the confidence interval provide convincing evidence that the true proportions differ? Justify your answer.

A group of doctors published an article in the New England Journal of Medicine. In the article they revealed ne findings ofa study to determine if there is a difference in survival rates for men who undergo surgery for ocalized ssigned 731 men with localized prostate cancer to radical prostatectomy or observation. During the years of ollow-up, 245 of 367 (66.8%) assigned to surgery survived for at least 5 years and 223 of 364 men (61.3%) ssigned to observation survived for at least 5 prostate cancer and those who are treated with observation only. The researchers randomly years. a) Construct and interpret a 99% confidence interval for the difference in the true proportion of men like these that would survive for at least 5 years after receiving surgery and the proportion that would survive for at least 5 years when only being observed. b) Does the confidence interval provide convincing evidence that the true proportions differ? Justify your answer.

MATLAB: An Introduction with Applications
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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1. A group of doctors published an article in the New England Journal of Medicine. In the article they revealed the findings of a study to determine if there is a difference in survival rates for men who undergo surgery for localized prostate cancer and those who are treated with observation only. The researchers randomly assigned 731 men with localized prostate cancer to radical prostatectomy or observation. During the years of follow-up, 245 of 367 (66.8%) assigned to surgery survived for at least 5 years and 223 of 364 men (61.3%) assigned to observation survived for at least 5 years. (a) Construct and interpret a 99% confidence interval for the difference in the true proportion of men like these that would survive for at least 5 years after receiving surgery and the proportion that would survive for at least 5 years when only being observed. (b) Does the confidence interval provide convincing evidence that the true proportions differ? Justify your answer.
Transcribed Image Text:1. A group of doctors published an article in the New England Journal of Medicine. In the article they revealed the findings of a study to determine if there is a difference in survival rates for men who undergo surgery for localized prostate cancer and those who are treated with observation only. The researchers randomly assigned 731 men with localized prostate cancer to radical prostatectomy or observation. During the years of follow-up, 245 of 367 (66.8%) assigned to surgery survived for at least 5 years and 223 of 364 men (61.3%) assigned to observation survived for at least 5 years. (a) Construct and interpret a 99% confidence interval for the difference in the true proportion of men like these that would survive for at least 5 years after receiving surgery and the proportion that would survive for at least 5 years when only being observed. (b) Does the confidence interval provide convincing evidence that the true proportions differ? Justify your answer.
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