Based on the regression model shown below from the POInT Case, should any of the independent variables be removed from the model to predict healthcare charges because they are not statistically significant? No - any insignificant terms included have significant interactions or non-linear effects and therefore should be kept in the model. Yes, age (but not age_squared) should be removed. Yes, the indicator for BMI between 25-30 (BMI[25,30)) should be removed. Yes, the indicator for BMI greater than 35(BMI[35+) ) should be removed