The model in Exercise 30 is missing one predictor that we might have expected to see. Engine Displacement is highly correlated 1r = 0.7832 with MSRP, but that variable has not entered the model (and, indeed, would have a P-value of 0.54 if it were added to the model). Here is some evidence to explain why that may be.

a) What term describes the reason Displacement doesn€™t contribute to the regression model for MSRP?
b) Find the value of the Variance Inflation Factor for Displacement in the regression on MSRP.

Dependent variable is: Displacement R-squared 95.9% R-squared (adjusted) 95.7% s 35.54 with 100 6 94 degrees of freedom Variable Intercept Bore Clearance Engine Stroke-27.3943 5.2645.20