SOLUTION: Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no knowledge of the approximate value of the sample prop

Question 570761: Determine the sample size necessary to estimate a population proportion to within .03 with 90% confidence assuming you have no knowledge of the approximate value of the sample proportion.
Answer by richard1234(7193) (Show Source): You can put this solution on YOUR website!

, where z = 1.645, E = .03, assume p = .5 because this maximizes p(1-p) and we want a safe estimate. Plugging in everything, we obtain

A sample size of 752 would work.
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