The gas mileage of 5 different cars that a were identical versions of the same vehicle were: 20.4, 19.6, 17.1, 17.9, 18.7 mpg. It is reasonable to assume that gas mileage has a normal distribution. Find a 99% 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, 134.78 is entered as 134.8, 35.292 is entered as 35.3, .2750 is entered as 0.3, -.5647 is entered as -0.6