A researcher wishes to estimate, with 95% confidence, the population proportion of families who eat fast food at least once per week. Her estimate must be accurate within 3% 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

MATLAB: An Introduction with Applications
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ISBN:9781119256830
Author:Amos Gilat
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Chapter1: Starting With Matlab
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A researcher wishes to estimate, with 95% confidence, the population proportion of families who eat fast food at least once per week. Her estimate must be accurate within 3% 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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