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We are interested in estimating the average Salary (in thousands of dollars) for anyone with 24 years of experience. A sample of 15 employees is taken and the estimated relationship is E(Salary | Experience) = 48.64+ 0.98 Experience, where the sum of squared residuals is 324.52, the mean experience is 18 years, and SXX = 970. Using a critical value of 1.77, find the lower bound of a 90% confidence interval for the average salary corresponding to 24 years of experience