A researcher wishes to estimate, with 99% confidence, the population proportion of families who eat fast food at least once per week. Her estimate must be accurate within 5% of the population proportion. Find the minimum sample size needed, using a prior study that found that 16%

Holt Mcdougal Larson Pre-algebra: Student Edition 2012
1st Edition
ISBN:9780547587776
Author:HOLT MCDOUGAL
Publisher:HOLT MCDOUGAL
Chapter11: Data Analysis And Probability
Section11.5: Interpreting Data
Problem 1C
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A researcher wishes to estimate, with 99% confidence, the population proportion of families who eat fast food at least once per week. Her estimate must be accurate within 5% of the population proportion.

Find the minimum sample size needed, using a prior study that found that 16% of the respondents said they eat fast food four to six times per week

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