THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION

Multiple Choice

THE NEXT QUESTIONS ARE BASED ON THE FOLLOWING INFORMATION:
A sales representative has 425 accounts.From a random sample of 60 of these accounts,she found that the average yearly order was $1,250 with a standard deviation of $70.She also found that 28 out of 60 in the sample have placed an order in the last four weeks.
-Find the 90% confidence interval for the proportion of all accounts that placed an order within the last four weeks.

A) 0.467 ± 0.412
B) 0.467 ± 0.266
C) 0.467 ± 0.838
D) 0.467 ± 0.120