2. Suppose that the mean of the population X is known, the variance ² is unknown, and X₁, X₂, X, is a sample from the population, then the following quantity ( ) that is NOT statistics X₁ + X₂ + X₂ 2 1 2X₁ + X₂ + X₂-3μ 3 max {X₁, X₂, X₂} 4 X₁ X₂ X3

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