Suppose that X1,...,Xn form a random sample from
Chapter 8, Problem 8(choose chapter or problem)
Suppose that \(X_{1}, \ldots, X_{n}\) form a random sample from the normal distribution with unknown mean \(\mu\) and known variance \(\sigma^{2}>0\). Show that \(\bar{X}_{n}\) is an efficient estimator of \(\mu\).
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