) Show that if is an unbiased estimator of 0 and Var(6) + 0, then n² is not an unbiased estimator of 0². ) Let X be a binomial random variable with parameters n and p. (i) Show that the sample proportion P = X is an unbiased estimator of p. (ii) Determine whether X X 1 is an unbiased estimator of the variance of X.

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