Problem Set #6

Which of the following statements are accurate about the population regression model?

Which of the following statements are accurate? (a) is an estimate of ui. (b) Xi is assumed to be measured without error. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct.

Which of the following statements are accurate? (a) E(ui) = 0. (b) =0. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct.

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 Xi will always be . (b) By specifying a bivariate regression model we are assuming that there are no other variables that cause Yi. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct.

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?"

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.

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

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 2.4. (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.

Which of the following is true about the root mean-squared error statistic? (a) This statistic is provides a measure of the average accuracy of the model in the metric of the dependent variable. (b) This statistic is sometimes referred to as the standard error of the regression model. (c) Both (a) and (b) are correct. (d) Neither (a) nor (b) are correct.

Which of the following is not true about the R-squared statistic?

Thomas thinks that X is positively related to Y and runs a regression model. Which of the following is true?