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Asked Nov 12, 2019
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A study at Harvard found that 44% of their students binge drink.  You are at Princeton doing a similar study.  How many people do you need to interview to get your interval width down to 10 percentage points?  For a 95% CI, what is that sample size?  

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According to the provided information, a study at Harvard found that 44% of their students binge drink. In order to calculate ...

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width for an interval width of 10%, margin of error 2 10 2 = 5% -0.05 margin of error (E) 95% CI critical (=) Estimated proportion(p): 0.05 1.96 0.44

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