How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points?
How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points?
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 3E
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Gap, Banana Republic, J. Crew, Yahoo, and America Online are just a few of the many companies interested in knowing the percentage of adults who buy clothing online. How many adults must be surveyed in order to be 95% confident that the sample percentage is in error by no more than three percentage points? Use this recent result from the Census Bureau: 66% of adults buy clothing online.
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