Fuel economy estimates for automobiles built one year predicted a mean of 27.2 mpg and a standard deviation of 4.8 mpg for highway driving. Assume that a Normal model can be applied. Use the 689599.7

a)In what interval would you expect the central 95% of autos to befound?

Using the68-95-99.7 rule, the central 95% of autos can be expected to be found in the interval from