A financial officer for a company wants to estimate the percent of accounts receivable that are more than 30 days overdue. He surveys 475 accounts and finds that 250 are more than 30 days overdue. Compute a 95% confidence interval for the true percent of accounts receivable that are more than 30 days overdue, and interpret the confidence interval.

(Give answers in 2 decimal points)

a) E =

b) Confidence Interval 1 =

c) Confidence Interval 2