Data on National Hockey League team performance was presented in Exercise 12-11.
(a) Test the model from this exercise for significance of regression using a = 0.05. What conclusions can you draw?
(b) Use the t-test to evaluate the contribution of each regressor to the model. Does it seem that all regressors are necessary? Use a = 0.05.
(c) Fit a regression model relating the number of games won to the number of points scored and the number of power play goals. Does this seem to be a logical choice of regressors, considering your answer to part (b)? Test this new model for significance of regression and evaluate the contribution of each regressor to the model using the t-test. Use a = 0.05.