Let Y and Y

(5 points) Suppose X1, X2, . . .,Xn iris N01, 02). We know that X is a good estimator of p. We also know that X is unbiased, i.e., EX 2 p. To estimate 02, we have the following two options: 1 n _ 25:1(Xi X)2; nl i 1 n _ ' S2 = 21=1(Xi X?- .32: If we would like to have an unbiased estimate of 0'2, which estimator should we use? Justify your conclusion