How large a sample is needed in order to be 98% confident that the sample propor

Mathematics
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Researcher at a major clinic wishes to estimate the proportion of the adult population of the US that has sleep deprivation. How large a sample is needed in order to be 98% confident that the sample proportion will not differ from the true proportion by more than 5%? 

May 1st, 2015

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May 1st, 2015

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