A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in a medical journal suggested that approximately 7% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 using the estimate 0.07 for p B) A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 when no estimate of p is available.

A medical researcher wants to construct a 99% confidence interval for the proportion of knee replacement surgeries that result in complications. An article in a medical journal suggested that approximately 7% of such operations result in complications. Using this estimate, what sample size is needed so that the confidence interval will have a margin of error of 0.03? A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 using the estimate 0.07 for p B) A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 when no estimate of p is available.

Calculus For The Life Sciences

2nd Edition

ISBN:9780321964038

Author:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Publisher:GREENWELL, Raymond N., RITCHEY, Nathan P., Lial, Margaret L.

Chapter13: Probability And Calculus

Section13.2: Expected Value And Variance Of Continuous Random Variables

Problem 10E

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Question

A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 using the estimate 0.07 for p

B) A sample of operations is needed to obtain a 99% confidence interval with a margin of error of 0.03 when no estimate of p is available.

Definition Definition Number of subjects or observations included in a study. A large sample size typically provides more reliable results and better representation of the population. As sample size and width of confidence interval are inversely related, if the sample size is increased, the width of the confidence interval decreases.

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