Question: Refer to Kidney function Problem 9.15 and the regression model fitted in part (c). a. Obtain the variance inflation factors. Are there indications that serious

Refer to Kidney function Problem 9.15 and the

Refer to Kidney function Problem 9.15 and the regression model fitted in part (c). a. Obtain the variance inflation factors. Are there indications that serious multicollinearity problems exist here? Explain. b. Obtain the residuals and plot them separately against and each of the predictor variables. Also prepare a normal probability plot of the residuals. c. Prepare separate added-variable plots against e(X11X2, X3), e(X2lX1, X3), and e(X31X1, X2). d. Do the plots in parts (b) and (c) suggest that the regression model should be modified? Refer to Kidney function Problem 9.15 and the regression model fitted in part (c). a. Obtain the variance inflation factors. Are there indications that serious multicollinearity problems exist here? Explain. b. Obtain the residuals and plot them separately against and each of the predictor variables. Also prepare a normal probability plot of the residuals. c. Prepare separate added-variable plots against e(X11X2, X3), e(X2lX1, X3), and e(X31X1, X2). d. Do the plots in parts (b) and (c) suggest that the regression model should be modified

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