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A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical acivity. should be obtained if he wishes the estimate to be within four percentage points with 95% confidence, assuming that (a) he uses the estimates of 22.5% male and 19.6% female from a previous year? (b) he does not use any prior estimates? ... (a) n = (Round up to the nearest whole number.)

A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical acivity. should be obtained if he wishes the estimate to be within four percentage points with 95% confidence, assuming that (a) he uses the estimates of 22.5% male and 19.6% female from a previous year? (b) he does not use any prior estimates? ... (a) n = (Round up to the nearest whole number.)

A First Course in Probability (10th Edition)
A First Course in Probability (10th Edition)
10th Edition
ISBN:9780134753119
Author:Sheldon Ross
Publisher:Sheldon Ross
Chapter1: Combinatorial Analysis
Section: Chapter Questions
Problem 1.1P: a. How many different 7-place license plates are possible if the first 2 places are for letters and...
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A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within four percentage points with 95% confidence, assuming that (a) he uses the estimates of 22.5% male and 19.6% female from a previous year? (b) he does not use any prior estimates? (a) n = (Round up to the nearest whole number.)
Transcribed Image Text:A physical therapist wants to determine the difference in the proportion of men and women who participate in regular sustained physical activity. What sample size should be obtained if he wishes the estimate to be within four percentage points with 95% confidence, assuming that (a) he uses the estimates of 22.5% male and 19.6% female from a previous year? (b) he does not use any prior estimates? (a) n = (Round up to the nearest whole number.)
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