Mathematics, 03.11.2020 16:50 payton05
Minnesota Public Radio wants to duplicate a survey conducted in 2016 that found that 65% of adults living in Minnesota felt that the country was going in the wrong direction. How many people would need to be surveyed for a 90% confidence interval to ensure the margin of error would be less than 3%? (You must show the formula and your algebraic work to receive credit for this problem.)
Answers: 3
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![n =[ \frac{Z_{\frac{\alpha }{2} }}{E} ]^2 * p(1-p)](/tpl/images/0863/3745/25211.png)
![n =[ \frac{1.645 }{0.03} ]^2 * 0.65(1-0.65)](/tpl/images/0863/3745/a386a.png)
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