Answer Happy

Suppose X is one of the explanatory variables in a multiple regression, and it is associated with a measurement error which is correlated with the disturtune tem Let Bo be the OLS estimator for the coefficient of X. A researcher found that another variable Z works aja valid instrument for X, and then obtain the commanding Vid Which of the following statements is correct? O The greater the correlation between X and Z, the larger the vanance of , will be. A, has the smaller variance than o in general. OA, has the larger variance than o in general. O The smaller the correlation between X and Z, the larger the variance of Ao will be