Question: For the life expectancy data, Consider the MLR model given by Y ~ X_1 X_2 X_3. (a) [6 pts] Obtain a partial regression plot for

For the life expectancy data, Consider the MLR model given by Y ~ X_1 X_2 X_3. (a) [6 pts] Obtain a partial regression plot for X_1, X_2, and X_3 and discuss whether the regression relationships in the fitted regression function are inappropriate for any of the predictor variables. (b) [10 pts] Check for influential points by calculating DFFITS, DFBETAS and Cook's distance values. (c) [8 pts] Determine whether there is multicollinearity present based on VIF

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