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QUESTION
Let X 1 , X 2 , X 3 , X 4 be iid random variables each one with probability N(10, 4). Let Y 1 , Y 2 , Y 3 be iid random variables each one with...
Let X1, X2, X3, X4 be iid random variables each one with probability N(10, 4σ).
Let Y1, Y2, Y3 be iid random variables each one with probability N(5, 3σ).
The two samples are independent. Also, let
