Answer: Consider the electric power consumption data in
Chapter 12, Problem 70E(choose chapter or problem)
Consider the electric power consumption data in Exercise 12-10
(a) Calculate \(R^{2}\) for this model. Interpret this quantity.
(b) Plot the residuals versus \(\hat{y}\) and versus each regressor. Interpret this plot.
(c) Construct a normal probability plot of the residuals and comment on the normality assumption.
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