In a random sample of 40 patients undergoing a standard surgical procedure, 14 needed pain medication after the surgery. In another random sample of 40 patients, 10 needed pain medication after a new surgical procedure. A physician would like to know if proportion of patients who need postoperative pain medication is different for standard and new procedures. Let P1 be the true proportion of patients who need postoperative pain medication after the standard surgical procedure and P2 be the true proportion of patients who need postoperative pain medication after the new surgical procedure. 1. We can use the formula did in the class to construct a confidence interval for difference is two proportions as each sample has at least [Select] [Select] successes and at least failures. 2. 95% confidence interval for P1-P2 is: [Select] >

In a random sample of 40 patients undergoing a standard surgical procedure, 14 needed pain medication after the surgery. In another random sample of 40 patients, 10 needed pain medication after a new surgical procedure. A physician would like to know if proportion of patients who need postoperative pain medication is different for standard and new procedures. Let P1 be the true proportion of patients who need postoperative pain medication after the standard surgical procedure and P2 be the true proportion of patients who need postoperative pain medication after the new surgical procedure. 1. We can use the formula did in the class to construct a confidence interval for difference is two proportions as each sample has at least [Select] [Select] successes and at least failures. 2. 95% confidence interval for P1-P2 is: [Select] >

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 7CR

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