Mathematics, 12.03.2020 17:15, jessicalivchits8486
I want to take a survey of students at my university to find out what proportion like the new bus service on campus. I believe that 75% of students like the service. How many students will I need to survey if I want to estimate, with 99% confidence, the true proportion to within 2%?
Answers: 1
, and a confidence level of 
, we have the following confidence interval of proportions.
.
, z is the value of Z that has a pvalue of 
, so 
.
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