Question: A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and

A savings and loan association needs information concerning the checking account balances of its local customers. A random sample of 14 accounts was checked and yielded a mean balance of$664.14 and a standard deviation of$297.29. Assume that the population is normally distributed. Find a90% confidence interval for the true mean checking account balance for local customers. Round to two decimal places.

$523.43 to$804.85

$493.71 to$834.57

$492.52 to$835.76

$455.65 to$872.63

I'm most confused with understanding where to plug in each number into the equation when using my TI-84 Calculator

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