Prostate cancer There has been debate among doctors over whether surgery can prolong life among men suffer-ing from prostate cancer, a type of cancer that typically develops and spreads very slowly. Recently, The NewEngland Journal of Medicine published results of some Scandinavian research. Men diagnosed with prostate can-cer were randomly assigned to either undergo surgery or not. Among the 347 men who had surgery, 16 eventuallydied of prostate cancer, compared with 31 of the 348 menwho did not have surgery.a) Was this an experiment or an observational study?Explain.b) Create a 95% confidence interval for the difference inrates of death for the two groups of men.c) Based on your confidence interval, is there evidencethat surgery may be effective in preventing death fromprostate cancer? Explain.
Prostate cancer There has been debate among doctors over whether surgery can prolong life among men suffer-ing from prostate cancer, a type of cancer that typically develops and spreads very slowly. Recently, The NewEngland Journal of Medicine published results of some Scandinavian research. Men diagnosed with prostate can-cer were randomly assigned to either undergo surgery or not. Among the 347 men who had surgery, 16 eventuallydied of prostate cancer, compared with 31 of the 348 menwho did not have surgery.a) Was this an experiment or an observational study?Explain.b) Create a 95% confidence interval for the difference inrates of death for the two groups of men.c) Based on your confidence interval, is there evidencethat surgery may be effective in preventing death fromprostate cancer? Explain.
Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section: Chapter Questions
Problem 8CR
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Prostate cancer There has been debate among doctors
over whether surgery can prolong life among men suffer-
ing from prostate cancer, a type of cancer that typically
ing from prostate cancer, a type of cancer that typically
develops and spreads very slowly. Recently, The New
England Journal of Medicine published results of some
England Journal of Medicine published results of some
Scandinavian research. Men diagnosed with prostate can-
cer were randomly assigned to either undergo surgery or
cer were randomly assigned to either undergo surgery or
not. Among the 347 men who had surgery, 16 eventually
died of prostate cancer, compared with 31 of the 348 men
who did not have surgery.
a) Was this an experiment or an observational study?
Explain.
b) Create a 95% confidence interval for the difference in
rates of death for the two groups of men.
c) Based on your confidence interval, is there evidence
that surgery may be effective in preventing death from
prostate cancer? Explain.
died of prostate cancer, compared with 31 of the 348 men
who did not have surgery.
a) Was this an experiment or an observational study?
Explain.
b) Create a 95% confidence interval for the difference in
rates of death for the two groups of men.
c) Based on your confidence interval, is there evidence
that surgery may be effective in preventing death from
prostate cancer? Explain.
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