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Use the data ‘attend’ for this exercise. (20 points) a. Obtain the minimum, maximum, and average values for the variables atndrte, priGPA, and ACT. b. Estimate the model atndrte = β0 + β1priGPA + β2ACT + u, and write the results in equation form. Interpret the intercept. Does it have a useful meaning? c. Discuss the estimated slope coefficients. Are there any surprises? d. What is the predicted atndrte if priGPA= 3.65 and ACT = 20? What do you make of this result? Are there any students in the sample with these values of the explanatory variables? e. If Student A has priGPA= 3.1 and ACT = 21 and Student B has priGPA= 2.1 and ACT = 26, what is the predicted difference in their attendance rates? f. Add the variable soph to the model in b and estimate the model. Interpret the coefficient. Is it justified to add soph? why or why not?
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