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You want to obtain a sample to estimate a population proportion. Based on previous evidence, you...

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 25%. You would like to be 99% confident that your estimate is within 1.5% of the true population proportion. How large of a sample size is required?

Math   Statistics-And-Probability   
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Answer #1

Refer Standard normal table/Z-table or use excel function "=NORM.S.INV((1-0.005))" to find the Z-value.

Round the value to the nearest whole number.

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