Exercise 16 describes a regression model that uses a car’s engine displacement to estimate its fuel economy. In this context, what does it mean to say that a certain car has a positive residual?

Data From Exercise 16

In Chapter 6, Exercise 41 we examined the relationship between the fuel economy (CombinedMPG) and Displacement (in liters) for 1211 models of cars. (Data in Fuel Economy 2016) Further analysis produces the regression model Displacement. If the car you are thinking of buying has a 4 liter engine, what does this model suggest your gas mileage would be?

Transcribed Image Text:

CombinedMPG 33.46 3.23.