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You want to obtain a sample to estimate a population proportion. At this point in time,...

You want to obtain a sample to estimate a population proportion. At this point in time, you have no reasonable preliminary estimation for the population proportion. You would like to be 95% confident that you estimate is within 4.5% of the true population proportion. How large of a sample size is required?

The last person who answered this question did not give me the correct answer nor instructions on how to find the different values. Can someone please walk me through all of the steps and where to find the answers?

Math   Statistics-And-Probability   
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