Problem Set 2 Answers - 1 Problem Set 2 Answers Question 1...

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1Problem Set 2 AnswersQuestion 1:In a study relating college grade point average to timespent in various activities, you distribute a survey to several students.The students are asked how many hours they spend each week in fouractivities: studying, sleeping, working, and leisure. Any activity is putinto one of the four categories, so that for each student the sum of hoursin the four activities must be 168. (i) In the modelGPA=°0+°1study+°2sleep+°3work+°4leisure+udoes it make sense to holdsleep,work, andleisure°xed, whilechangingstudy? (ii) Explain why this model violates Assumption MLR3.(iii) How could you reformulate the model so that its parameters have auseful interpretation and it satis°es Assumption MLR3?Answer:

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