You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 70%. You would like to be 99% confident that your estimate is within 3% of the true population proportion. How large of a sample size is required? Do not round mid-calculation. n =

Use the expression in the accompanying discussion of sample size to find the size of each sample if you want to estimate the difference between proportions of men and women who own smartphones. Assume that you want 90% confidence that your error is no more than 0.02. O Click the icon to view the discussion of sample size. The sample should includeOmen and women. (Type whole numbers.)

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 20%. 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? A. n=

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 87%. You would like to be 98% confident that your estimate is within 1% of the true population proportion. How large of a sample size is required?