Introductory Econometrics 4th Edition by Jeffrey Wooldridge

تمرين 21

Use the data in ATTEND.RAW for this exercise.
(i) Obtain the minimum, maximum, and average values for the variables atndrte, priGPA, and ACT.
(ii) Estimate the model
atndrte = 0 + 1 priGPA + 2 ACT + u,
and write the results in equation form. Interpret the intercept. Does it have a useful meaning
(iii) Discuss the estimated slope coefficients. Are there any surprises
(iv) 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
(v) 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