Suppose that the exam scores for students in a large university course are normally distributed with an unknown mean and standard deviation. The scores of 42 randomly sampled students in the course are used to estimate the mean of the population. What t-score should be used to find the 99% confidence interval for the population mean? df...4041424344t0.10…1.3031.3031.30 21.3021.301t0.05…1.6841.6831.6821.6 811.680t0.025…2.0212.0202.0182.0172 .015t0.01…2.4232.4212.4182.4162.414 t0.005…2.7042.7012.6982.6952.692 Use the portion of the table above or a calculator. If you use a calculator, round your answer to three decimal places.