Political Science > EXAM > POS 3713 /POS 3713 UNIT EXAM 4. QUESTIONS AND ANSWERS. (All)

POS 3713 /POS 3713 UNIT EXAM 4. QUESTIONS AND ANSWERS.

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POS 3713 /POS 3713 UNIT EXAM 4. QUESTIONS AND ANSWERS.Understanding Political Science Research (POS 3713‐01, Fall 2017, HCB 113) Prof. Jens Großer Unit exam #4 12/07/2017 This is the fourt... h out of four multiple choice tests (unit exams) that count for your final grade. There are 25 questions with four possible answers each. In all questions, only one of the four answers is correct. You will receive 1 point for each correct answer, and 0 points for each incorrect answer. Hence, the maximum possible points in this test are 25 points. Please read the questions and possible answers carefully before you make your choices! Also, don’t forget to write down and “bubble” your name on the answer sheet! On Chapter 8: The following 6 questions all refer to the population regression model and/or the sample regression model from a bivariate regression model where the population regression model is: Yi    X i  ui and the sample regression model is: Yi  ˆ  ˆX i  uˆi 1. Which of the following statements are accurate about the population regression model? (a) ௜ݑis the stochastic component of ܻ௜. (b) ˆ  ˆX i is the systematic component of ܻ௜. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. 2. Which of the following statements are accurate? (a) uˆi is an estimate of ui . (b) ܺ௜ is assumed to be measured without error. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. 3. Which of the following statements are accurate? (a) E(ui )  0. (b) E(ui2 )  0. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. 2 4. Which of the statements are accurate? (a) By specifying a bivariate regression model we are assuming that the impact of a one unit increase in ܺ௜ will always be .ߚ (b) By specifying a bivariate regression model we are assuming that there are no other variables that cause ܻ௜. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. 5. Which of the following statements are accurate? (a) In order to estimate a bivariate regression model, you must have at least two cases. (b) If ܺ௜ ൌ 4 for all observed ܺ௜ you can estimate a bivariate regression model. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. 6. Which of the following statements are accurate? (a) In hypothesis testing from a bivariate regression model, our conclusions do not depend on whether or not we have a directional hypothesis. (b) The null hypothesis for any hypothesis test about ߚwill be that ߚൌ 0. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct. [Show More]

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