A survey of 1972 adults asked how many years of education they had. The sample mean was 13.37 with a standard deviation of 3.13 years. Find a 98% confidence interval for the population mean. What is the LOWER BOUND? ______________________________ Note: Enter XXX.X AT LEAST ONE DIGIT BEFORE THE DECIMAL, ONE AFTER and round up. Thus, 347 is entered as 347.0, 3.52 is entered as 3.5, 0.2750 is entered as 0.3, -0.564 is entered as -0.6