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# FSU - POS 3713 - Exam four example test - Study Guide

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FSU - POS 3713 - Exam four example test - Study Guide

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This preview shows pages 1 - 3 of a 7 page document. to view the rest of the content Understanding Political Science Research (POS 3713-01, Fall 2016, BEL 180) Prof. Jens Großer Unit exam #4 12/07/2016 This  is  the  fourth  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.
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: i i i u X Y + + = β α and the sample regression model is: i i i u X Y ˆ ˆ ˆ + + = β α 1. Which of the following statements are accurate about the population regression
model?
(a) !
" is the stochastic component of # " . (b) i X β α ˆ ˆ + 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)
i uˆ is an estimate of i u . (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)
. 0 ) ( = i u E (b) . 0 ) ( 2 = i u E (c) Both (a) and (b) are correct.
(d) Neither (a) nor (b) are correct.
random component Yi is the systematic component 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 %. (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 % will be that % = 0.
(c) Both (a) and (b) are correct.
(d) Neither (a) nor (b) are correct.

The following 4 questions all refer to the results displayed in the figure below. In the
questions, numbers from the Stata results are rounded to two decimals.

Figure: Stata results for the two-variable regression model of BlairFeelings. Notes:  The  independent  variable,  “Iraq  War  Success  Scale”  comes  from  the
question: “Using a scale from 0 to 10 where 0 means a complete failure and 10
means  a  complete  success,  how  would  you  rate  the  war  in  Iraq?”  The
dependent  variable  “Blair  Feelings”  comes  from  responses  to  the  question:
“Now, some questions about the party leaders. Using a scale that runs from 0 to
10, where 0 means a very incompetent leader and 10 means a very competent
leader, how would you describe Tony Blair?”

alpha beta 7. In this example, if an individual has judged that Iraq war is a complete failure,
meaning that they have a value of 0 for the independent variable, what would be
their expected value for “Blair Feelings?”
(a) 0
(b) 5.00
(c) 4.70
(d) 0.31

8. Which of the following statements are accurate?
(a) For every one-unit increase in “Blair Feelings”, we can expect to see a 0.31 increase in
“Iraq War Success Scale.”
(b) For every one-unit increase in “Iraq War Success Scale”, we can expect to see a 0.31
increase in “Blair Feelings.”
(c) If the variable “Blair Feelings” is zero, it is highly likely that the variable “Iraq
War Success Scale” will also be equal to zero.
(d) None of the above.

9. Which of the following statements are accurate?
(a) It is highly unlikely that we would see the relationship that we are seeing between the
independent variable and the dependent variable in this model due to random chance.
(b) This model explains about 90% of the variation in “Blair Feelings.”
(c) Both (a) and (b) are correct.
(d) Neither (a) nor (b) are correct.

10. Which of the following statements are accurate?
(a) With these results, if we know the value of “Iraq War Success Scale” then we will be able
to predict the value of “Blair Feelings.” Our predictions will on average be off by 2.337.
(b) Even if an individual feels very negatively about how the Iraq war is going, they are
quite unlikely to have the worst possible judgment about Tony Blair's competence.
(c) Both (a) and (b) are correct.
(d) Neither (a) nor (b) are correct.

On Chapter 9:

11. What is the principal goal of multiple regression in social-scientific research?
(a) To validate the results of an experiment by applying it to a separate sample of data.
(b) To attempt to cross the second causal hurdle – that is, to see if Y might cause X.
(c) To maximize the likelihood that our sample is representative of the population as a
whole, thus making our findings statistically significant.
(d) To test whether X causes Y in observational research while controlling for other causes
of Y.

beta is the expected
value or estimate
0.31 = alpha.

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