Y.T.I. #2: Big Shoulders Insurance Company took a random sample of 50 insurance claims paid out during the last year and found that the mean was $1570 and the standard deviation was $260. A. Find and interpret a 90% confidence interval for the population mean insurance claim. B. The industry standard for last year was an average claim of $1540. Based on your interval computed above, does it appear that Big Shoulder's claims are above average