Question

A store randomly samples 603 shoppers over the course of a year and finds that 142 of them made their visit because of a coupon they’d received in the mail. We will construct a 95% confidence interval | for the fraction of all shoppers during the year whose visit was | because of a coupon they’d received in the mail

What is the standard error for the proportion of shoppers whose
| visit was because of a coupon they’d received in the mail? Round
| your answer to four decimal places

Find the standard error based on your sample proportion and the
| sample size n

Answer 1