electricmiles
61. Electric Cars. The accompanying table shows the miles-per-gallon equivalent (MPGe) for five electric cars, as reported by www.hybridcars.com in 2014.
Electric Vehicle | MPGe |
---|---|
Tesla Model S | 89 |
Nissan Leaf | 99 |
Ford Focus | 105 |
Mitsubishi i-MiEV | 112 |
Chevrolet Spark | 119 |
8.2.61
(a)
Acceptable normality. (b) (c) MPGe. We can estimate the population mean mileage to within 11.0 MPGe with 90% confidence.
(d) (93.8, 115.8). We are 90% confident that μ, the population mean mileage, lies between 93.8 MPGe and 115.8 MPGe.