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Exercise 4.1 For some integer k, set uk = E[Y*]. (a) Construct an estimator Ak for uk. (b) Show that fix is unbiased for /

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Exercise 4.1 For some integer k, set uk = E[Y*]. (a) Construct an estimator Ak for uk. (b) Show that fix is unbiased for / k. (c) Calculate the variance of fix, say var Ax). What assumption is needed for var (x ] to be finite? (d) Propose an estimator of var [Px]

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