question 20 Express the confidence interval (69.5%,85.7%)(69.5%,85.7%) in the form of ˆp±Ep^±E. % ±± % question 22 You want to obtain a sample to estimate a population proportion. Based on previous...

question 20

Express the confidence interval (69.5%,85.7%)(69.5%,85.7%) in the form of ˆp±Ep^±E.


% ±± %

question 22

You want to obtain a sample to estimate a population proportion. Based on previous evidence, you believe the population proportion is approximately 38%. You would like to be 95% confident that your estimate is within 1.5% of the true population proportion. How large of a sample size is required?



n =