1. For each of the following, determine whether the statement is true or false and provide a brief explanation of your answer. (a) Endogeneity does not occur if some but not all explanatory variables are correlated with the error term. (b) The OLS estimator may still be BLUE if the error term follows a non-normal distribution. (c) The degrees of freedom in a regression model (with an intercept) that has 50 observations and 6 regressors is 43 . (d) The significance level is the probability of wrongly accepting the alternative hypothesis when it is false. (e) The t statistic for testing H0:1=1 against H1:1=1 is given by t=^1/se(^1). (f) Confidence intervals for regression coefficients do not depend on the degrees of freedom of a distribution. 1. For each of the following, determine whether the statement is true or false and provide a brief explanation of your answer. (a) Endogeneity does not occur if some but not all explanatory variables are correlated with the error term. (b) The OLS estimator may still be BLUE if the error term follows a non-normal distribution. (c) The degrees of freedom in a regression model (with an intercept) that has 50 observations and 6 regressors is 43 . (d) The significance level is the probability of wrongly accepting the alternative hypothesis when it is false. (e) The t statistic for testing H0:1=1 against H1:1=1 is given by t=^1/se(^1). (f) Confidence intervals for regression coefficients do not depend on the degrees of freedom of a distribution