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A researcher wants to construct a 95% confidence interval for the proportion of elementary school students...

A researcher wants to construct a 95% confidence interval for the proportion of elementary school students in Seward County who receive free or reduced-price school lunches. What sample size is needed so that the confidence interval will have a margin of error of 0.03?

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Answer #1

No information about p so assume p =0.5

Answer : Sample size ( n ) = 1068

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