Recently gasoline prices rose drastically. Suppose that a study was conducted using truck drivers with equivalent years of experience to test run 24 trucks of a particular model over the same highway. Estimate the confidence interval for the population mean fuel consumption for this truck model with 90% confidence if the fuel onsumption, in miles per gallon, for these 24 trucks was as follows: 15.5 16.9 20.2 14.5 16.5 21.0 18.5 19.3 19.7 19.2 18.7 18.2 18.0 19.1 19.8 18.0 19.8 17.5 18.5 20.5 18.6 18.2 20.3 21.8 e sample variance formula is given as. - " ( - 702