Question a Of 8 A Click Submit to complete this assessment. 8 points Save Answer Jordan is the manager of a used book store. He wants to estimate the average amount a customer spends per visit. A random sample of 20 customer receipts had a mean of 'x-bar' = $6.90. Based on prior information, o = $2.45. Find a 90% confidence interval for the average amount spent by all customers. Interpret the interval in the context of this problem. Attach File