A department store is interested in the average balance that is carried on its store's credit card. A sample of 50 accounts reveals an average balance of $1,350 and a standard deviation of $350. Construct and interpret a 90% confidence interval for the mean account balance on this store's credit card. A Question 34 (4 points) Saved Listen Compute P(-1.50 sto $1.00) , where to has a t-distribution with 10 degrees of freedom