Answer Happy

The conditional mean zero assumption requires that... (Select all that apply). o X is strictly positive. The mean of the error term, ui, is the same for any value of X. E(ui) E(ui|X) Oui must have minimal variance. There is only a small amount of error in the regression. The error term and X are unrelated, or otherwise uncorrelated.
Which of the following set of observations would have a smaller om and why? Bi tokia The graph on the left because it has a smaller variance in X. The graph on the right because it has a smaller variance in X. The graph on the left because it has a larger variance in X. The graph on the right because it has a larger variance in X.
Say you run a bivariate regression on a data from a randomized control trial. You use Y for the outcome of interest, and X as a dummy variable for treatment. You estimate that ſo = 3, that ßi = 5, and that SEÂI) = = 4. With the standard null hypothesis in regression ( H: Bi = 0) can you say that treatment had a statistically significant impact? 5-0 Ot= 5, and since 15 > 2 we cannot reject that B1 = 0. 5-4 There is no statistically significant impact. 5-0 01 = 50 1.25, and since 1.25