QUESTION 4 1 points Save Answer Which of the following is true about a simple and multiple regression analysis? O The assumptions about the error term are the same. The properties of OLS estimators (unbiased, efficient, and consistent) are the same. All of the above. O None of the above. QUESTION 5 1 points Save Answer An important assumption we make with multiple regression is that of homoskedasticity. This means: the population regression line passes through the conditional means. the errors have a constant variance. O the residuals are normally distributed. the errors are independent of one another. None of the above. QUESTION 6 1 points Save Answer What is meant when we say that OLS can yield an efficient estimator of p? O The variance of our sample data will be as small as possible if the model is linear. The variance of B will equal equal the variance of b. The variance of the sampling distribution for b will be as small as possible. O The variance of the sampling distribution for b will be smaller than any other mathematical way to estimate a linear regression model that also yields an unbiased estimator