WNE A B DE 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 customers found that only 12 use their debit card monthly. Find 95% confidence intervals for the proportion of customers who use their debit card monthly. 1 2 3 Sample Size No. of customers using debit 4 card monthly 5 Alpha a 0.05 6 7 z-value 1.96 8 9 Sample Proportion 10 Standard Error 11 12 Upper Limit C.I. 13 Lower Limit C.I. 14 15 16 17 18