Estimating the variance I 2 puntos posibles (calificables) Let X1, ..., Xn ~N (u, 02 ). We are interested in estimating o' using the estimator oh = LE( X - Xn ) ? What is an equivalent expression for on 0 82 = 1 EL ( X; ) ? - Xn 0 82 = 1 EL ( X; ) ? + ( Xn ) 2 Is on unbiased? Yes No Estimating the variance II 2 puntos posibles (calificables) Consider the setup of the previous problem. Is on consistent? No Yes Is on asymptotically normal? Hint: Why does it suffice to assume that / = 0? No Yes