Question 9.248

electricmiles

52. Electric Cars. The accompanying table shows the miles-per-gallon equivalent (MPGe) for five electric cars, as reported by www.hybridcars.com in 2014. Assume the data are drawn from a normal distribution. Test whether the population mean mileage is greater than 90 MPGe, using level of significance .

Electric Vehicle Mileage
(MPGe)
Tesla Model S 89
Nissan Leaf 99
Ford Focus 105
Mitsubishi i-MiEV 112
Chevrolet Spark 119