Suppose that Y₁, Y2, Y3 denote a random sample from an exponential distribution with density function 1 f(y) = =-e-³, y>0, 0>0 Y₁+Y₂ Y₁+2Y₂, ₁ = Y(1) Five estimators are proposed for the parameter 0, Ô₁ = Y₁, Ô₂ = · and  =Ÿ 2 3 2,03 =

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