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Unformatted text preview: Midterm 2 - Spring 2010 - Form B Economics 203 Instructors: Petry and Sahakyan Name: Before beginning the exam, please verify that you have 16 pages with 43 questions in your exam booklet. You should also have a decision-tree and formula sheet provided to you. Please include your full name and Net-ID on your bubble sheets. Based on the name of your TA and discussion time, please code in the following for the “Section” portion on your scantron: TA Name Discussion Day and Time Section Josh Brown Thursday 9am 001 Josh Brown Thursday 10am 002 Josh Brown Thursday 11am 003 Rafael Ribas Thursday 12pm 004 Rafael Ribas Thursday 1pm 005 Rafael Ribas Thursday 2pm 006 Andreas Hagemann Friday 8am 007 Andreas Hagemann Friday 9am 008 Andreas Hagemann Friday 10am 009 Sergey Popov Friday 11am 010 Sergey Popov Friday 12pm 011 Sergey Popov Friday 1pm 012 Esra Ergul Friday 11am 013 Esra Ergul Friday 12pm 014 Esra Ergul Friday 1pm 015 Lusha Zhu Friday 2pm 016 Lusha Zhu Friday 3pm 017 Lusha Zhu Friday 4pm 018 Good luck! 1. Which of the following statements best describes positive autocorrelation? a. The distribution of the residuals is skewed, so that it does not resemble a bell-shaped curve b. Consecutive residuals are likely to have the same sign, either both positive, or both negative c. Consecutive residuals are likely to have the opposite sign, one positive and one negative d. The absolute size of the residuals is related to the value of the dependent variable e. Two or more of the independent variables have a high correlation 2. The value of R 2 for your linear model is 0, with n=50, k=4, and SST=50,000. What is the value of the F-statistic? a. Unknown; need parameter values. b. Unknown; need SSE and SST. c. Unknown; need amount of variables. d. 0. e. + ∞ . 1 Use the following information to answer the next 6 questions (3-8): Prof. Fair in 1978 proposed a model to explain which characteristics are related to extramarital affairs. His data includes the following variables: ratemarr number of extramarital affairs (dependent variable) educ education (years schooling) blue profession is considered blue collar (=1 if yes, otherwise 0) yrsmarr years married kids =1 if have kids, otherwise 0 relig religiousness index (5 = very religious, ... , 1 = not religious) We estimated his model with a sample of men. Here is our Excel output: ANOVA df SS MS F Significance F Regression 397.0539764 Residual 280 Total 3089.496503 Coefficients Standard Error t Stat P-value Lower 95% Upper 95% Intercept 3.849 1.5264 2.5216 0.012237 0.8443 6.8537 educ 0.073 0.0777 0.9395 0.348284-0.08 0.226 blue-0.76-4.2553 0.000029 yrsmarr 0.0395 2.8101 0.005302 0.0332 0.1888 kids-0.1 0.4805-1.0459 0.8459 relig-0.474 0.1581-2.9981 0.002961-0.7852-0.1628 3. How many observations are there in this sample?...
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This note was uploaded on 02/14/2011 for the course ECON 203 taught by Professor Petry during the Spring '09 term at University of Illinois, Urbana Champaign.
- Spring '09