9.2 The dean of a graduate school wishes to predict the grade point average in graduate work for recent applicants. List a dozen variables that might be useful explanatory variables here.
9.4 In forward stepwise regression. what advantage is there in using a relatively small α-to-enter
value for adding variables? What advantage is there in using a larger α-to-enter value?
9.7 An engineer has stated: "Reduction or the number of explanatory variables should always be
done using the objective forward stepwise regression procedure." Discuss.
9.8 An attendee at a regression modeling short course stated: "I rarely see validation or regression models mentioned in published papers. so it must really not be an important component of model building." Comment.