Use the data ‘attend’ for this exercise. (20 points) a. Obtain the minimum, maximum, and average values for the variables atndrte, priGPA, and ACT.
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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