MGT 6203 FINAL EXAM Updated version 2023 with Correct solutions.

Week 1 Q1) What would be the null hypothesis for the regression F-test for the following equation Y = 0 + 1 x1 + 2 x2 + u A. 1 = 0 and 2 = 0 B. 1 = 0 or 2 = 0 C. 0 = 0 and 1 = 0 and 2 = 0 D. 0 = 0 or 1 = 0 or 2 = 0 Ans: A, the regression F-statistics test the joint null hypothesis that the values of all the coefficients of explanatory variables except the constant are 0. The intercept is not included in the hypothesis. (Week 1, slide 24 and 32) Week 2 Q2) Which type of model does NOT allow for an isolated interpretation of coefficients. a. Linear-Log Model b. Log-Linear Model c. Log-Log Model d. Polynomial Answer: D Explanation: Lesson 3/ video 5 / slide 4 Week 3 Q3) A group of 20 students spend between 0 and 6 hours studying for an exam (number of hours being the predictor). The response variable has 2 outcomes: Pass-1, Fail-0. The logistic regression analysis gives the following output: Coefficient Std.Error z-value P-value Intercept −4.0777 1.7610 −2.316 0.0206 Hours 1.5046 0.6287 2.393 0.0167 What is the probability of passing the exam for a student who studies 2 hours? a. 0.87 b. 0.26 c. 0.34 d. 0.61 p= e(b0+b1*x)/(1+ e(b0+b1*x)) = e(-4.078+2*1.505)/(1+ e(-4.078+2*1.505))