Solved: Let X be a random variable with mean and variance 2 . Given two independent
Chapter 7, Problem 7-57(choose chapter or problem)
Let X be a random variable with mean and variance 2 . Given two independent random samples of sizes n1 and n2, with sample means and , show that is an unbiased estimator for . If and are independent, find the value of a that minimizes the standard error of .
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