Mathematics, 20.11.2020 14:00, dondre54
A political candidate has asked you to conduct a poll to determine what percentage of people support her. If the candidate only wants a 2% margin of error at a 97.5% confidence level, what size of sample is needed?Give your answer in whole people.
Answers: 3
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![n = [\frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * \^ p (1 - \^ p )](/tpl/images/0917/1664/c7923.png)
![n = [\frac{2.241}{0.02} ]^2 *0.5 (1 - 0.5 )](/tpl/images/0917/1664/8e56d.png)
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