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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.9.

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately p = 0.9. You would like to be 90% confident that your estimate is within 5% of the true population proportion. How large of a sample size is required?

n =

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