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 three percentage points with 99% confidence, assuming that (a) he uses the estimates of 22.2% male and 19.1% 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 activity. What sample size should be obtained if he wishes the estimate to be within three percentage points with 99% confidence, assuming that (a) he uses the estimates of 22.2% male and 19.1% female from a previous year? (b) he does not use any prior estimates? (a) n = (Round up to the nearest whole number.)

Holt Mcdougal Larson Pre-algebra: Student Edition 2012

1st Edition

ISBN:9780547587776

Author:HOLT MCDOUGAL

Publisher:HOLT MCDOUGAL

Chapter11: Data Analysis And Probability

Section11.4: Collecting Data

Problem 2E

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