The Carbohydrate content of a glycoprotein is determined to be 12.6, 11.9, 13.0, 12.7, 12.5 g of carbohydrate per 100 g protein in replicate analysis. Find the 50% and 90% confidence intervals for the carbohydrate content t for 50% confidence interval = 0.741 and t for 90% confidence interval = 2.132