Table 2 shows that multicollineary exists in the model because several variables presents very high values for the
VIF. Therefore multicollinearity is avoided by removing those variables with VIF higher than 5 from the model.
Although MASS SATURATION shows a VIF greater than 5, it has been included in the final model because such
value is actually due to the dependence on the MASS variable. Once MASS is removed from the model, the VIF of
MASS SATURATION becomes acceptable.