2. We are interested in understanding if class year of high school students (junior vs senior) is a predictor of risk taking while driving. We measure the speed of students leaving school one mile away from the parking lot.

a) Name two variables we could add to the model (pairing idea) to reduce within group variability.

2. We are interested in understanding if class year of high school students (junior vs senior) is a predictor of risk taking while driving. We measure the speed of students leaving school one mile away from the parking lot. a) Name two variables we could add to the model (pairing idea) to reduce within group variability