**Note**Your answers to the questions below should follow the expectations for homework found here. Due date is on the Dates page.

## Car Horsepower and Gas Mileage II

Students in the Introduction to Environmental Studies course were interested in what characteristics of cars affected the gas mileage (miles per gallon) of a car. Using an internet search they recorded several variables on a sample of makes of cars (note that these data are industry-reported summaries for the make of a car, not measurements on an individual car). Two of the variables that they recorded were *mpg* (miles per gallon of gasoline for the car) and *hp* (horsepower of the car engine). These data, along with many other variables are in CarMPG.csv (download, meta). Use these data to compute a model that can be used to predict the mpg of a car from its horsepower.

- Assess the independence assumption.
- Thoroughly test the linearity assumption.
- Thoroughly test the homoscedasticity assumption.
- Thoroughly (
*use all possible options*) test the normality assumption. - Thoroughly (
*use all possible options*) test the outliers assumption.