Q:Question:12. The bank of New England is concerned about the amount of debt being accrued by customers using its credit cards. The board of directors voted to institute an expensive monitoring system if the mean for all of the bank's customers is greater than \( \$ 2000 \). The banks randomly selected 50 credit card holders and determine the amounts they charged. For this sample group the mean is \( \$ 2177 \) and standard deviation is \( \$ 1257