Use the data in ATTEND.RAW for this exercise.
(i) In the model of Example 6.3, argue that

Use equation (6.19) to estimate the partial effect when priGPA = 2.59 and atndrte = 82. Interpret your estimate.
(ii) Show that the equation can be written as

Where (2 = (2 + 2(4 (2.59) + (6 (82.) (The intercept has changed, but this is unimportant.) Use this to obtain the standard error of 2 from part (i).
(iii) Suppose that, in place of priGPA (atndrte - 82), you put (priGPA - 2.59). (atndrte - 82). Now how do you interpret the coefficient on atndrte and priGPA?

Astndfnl/ApriGPA B, + 2B priGPA + B,atndrte.