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any prior estimates?

any prior estimates?

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
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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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 she wishes the estimate to be within three percentage points with 90% confidence, assuming that (a) she uses the estimates of 21.7% male and 18.7% female from (b) she does not use any prior estimates? previous year? (a) n= (Round up to the nearest whole number.) (b) 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 she wishes the estimate to be within three percentage points with 90% confidence, assuming that (a) she uses the estimates of 21.7% male and 18.7% female from (b) she does not use any prior estimates? previous year? (a) n= (Round up to the nearest whole number.) (b) n= (Round up to the nearest whole number.)
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