Federal officials are studying educational debt in the U.S.. The total amount of money owed by individual college graduates in educational loans in the U.S. has a population standard deviation of = $ 4 , 328

Please use this information to answer the next two questions.

The officials of the previous question now want to estimate the true mean educational debt of individual college graduates in the U.S. Calculate the sample size that would be needed to do a 90% confidence interval for the true mean amount of debt owed, with a margin of error of $250. Round 3 decimal places