Suppose we want to estimate the effects of alcohol consumption (alcohol) on college grade point aver- age (colGPA). In addition to collecting information on grade point averages and alcohol usage, we also obtain attendance information (say, percentage of lectures attended, called attend). A standardized test score (say, SAT) and high school GPA (hsGPA) are also available. (i) Should we include attend along with alcohol as explanatory variables in a multiple regression model? (Think about how you would interpret Balcohol-) |(ii) Should SAT and hsGPA be included as explanatory variables? Explain.

Question
Suppose we want to estimate the effects of alcohol consumption (alcohol) on college grade point aver-
age (colGPA). In addition to collecting information on grade point averages and alcohol usage, we also
obtain attendance information (say, percentage of lectures attended, called attend). A standardized test
score (say, SAT) and high school GPA (hsGPA) are also available.
(i) Should we include attend along with alcohol as explanatory variables in a multiple regression
model? (Think about how you would interpret Balcohol-)
|(ii) Should SAT and hsGPA be included as explanatory variables? Explain.
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Transcribed Image Text

Suppose we want to estimate the effects of alcohol consumption (alcohol) on college grade point aver- age (colGPA). In addition to collecting information on grade point averages and alcohol usage, we also obtain attendance information (say, percentage of lectures attended, called attend). A standardized test score (say, SAT) and high school GPA (hsGPA) are also available. (i) Should we include attend along with alcohol as explanatory variables in a multiple regression model? (Think about how you would interpret Balcohol-) |(ii) Should SAT and hsGPA be included as explanatory variables? Explain.