Question: solve it Problem 13. Suppose that X is a random variable with mean / and variance o. Let X1, . .. , X10 be a

solve it

Problem 13. Suppose that X is a random variable with mean / and variance o. Let X1, . .. , X10 be a random sample of size 10 drawn from X. Which of the following estimators of u has the smallest variance? A. X1, B. XitX5+X10 3 C. LienXi 10 D. XitX10 2

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