Answer to Question #297406 in Statistics and Probability for mel

Question

& A survey will be conducted on the use of social media among senior high school students.

a. How large a sample must be obtained if the researchers want to be 95% confident that the

error will not exceed 5%?

b. Suppose the researchers conducted the survey involving 500 senior high school students and 400 responded that they have social media accounts. Give the 99% confidence interval for the true proportion of senior high school students who have social media accounts.