Question: 11. A bank sampled its customers to determine the proportion of customers who use their debit card at least once each month. A sample of

11. A bank sampled its customers to determine the proportion of customers who use their debit card at least once each month. A sample of 50 cus- tomers found that only 12 use their debit card monthly. Find 95% and 99% confidence intervals for the proportion of customers who use their debit card monthly. Use the appropriate formula and verify your result using the Confidence Intervals workbook.

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