Mathematics, 20.04.2020 21:29 ThatOneGuy8144
After a month-long survey, you collect 146 responses. You found that 83% of the customers indicated the life of the motor is greater than 10 years. You would like to understand what proportion of the motors last longer than 10 years. How many surveys would you need to collect in total in order to obtain a margin of error of /- 5% with 89.9% confidence
Answers: 2
![n=[\frac{z_{\alpha/2}\times \sqrt{\hat p(1-\hat p)}}{MOE}]^{2}](/tpl/images/0612/9501/cffa1.png)
![=[\frac{1.64\times \sqrt{0.83(1-0.83)}}{0.05}]^{2}](/tpl/images/0612/9501/b3779.png)
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After a month-long survey, you collect 146 responses. You found that 83% of the customers indicated...
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