Question: Consider the stack loss data in Exercise 12-16. Build regression models for the data using the following techniques: (a) All possible regressions. (b) Stepwise regression.

Consider the stack loss data in Exercise 12-16.
Build regression models for the data using the following techniques:

(a) All possible regressions.

(b) Stepwise regression.

(c) Forward selection.

(d) Backward elimination.

(e) Comment on the models obtained. Which model would you prefer? Why?

(f) Remove any influential data points and repeat the model building in the previous parts? Does your conclusion in part

(e) change?

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