The First National Bank of Wilson has 650 checking accounts customers. A recent sample of 50 of these customers showed 26 to have a VISA card with the Bank. Construct the 99 percent confidence intervalfor the proportion of checking account customers who have a VISA card with the bank.
Sample proportion = 26/50=0.52
Standard Error = (pq/n)^0.5 …
This solution constructs a 99% confidence interval.