Question 3 Using data from students in the U.S., the following equation of test score achievement is obtained by OLS: ztestscore = 0.680 + 0.0405tudyz'ime 0.002Sz'mlyz'ime2 0.0251(3) 0.1 lalcohol 0.155kip * alcohol (0.128) (0.014) (0.0022) (0.014) (0.073) (0.01) n = 204, R2 = .3426 ztestscore measures student performance on a math test, and is normalized to have mean zero, standard deviation one. studytime is time spent studying and is measured in minutes. skip is a binary indicator equal to 1 if a student skipped school in the past month. alcohol is a binary indicator equal to 1 if a student drank alcohol in the past month. A a) What is the difference in 21931500\" 6 between two students that did not skip school, but one drank alcohol and the other did not? What is the difference in zrestscore between an individual that skipped school and drank alcohol relative to a student that neither skipped school nor drank alcohol