Question: Consider the regression model for the NHL data from Exercise 12-11. (a) Fit a model using pts as the only regressor. (b) How much variability

Consider the regression model for the NHL data from Exercise 12-11.
(a) Fit a model using “pts” as the only regressor.
(b) How much variability is explained by this model?
(c) Plot the residuals versus and comment on model adequacy.
(d) Plot the residuals versus “PPG,” the points scored while in power play. Does this indicate that the model would be better if this variable were included?

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