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4. Suppose that X1, X2, ..., Xn are i.i.d. with densitry function f (x; 0) = e-(x-0), x20. (a) Find a sufficient statistic for 0.

4. Suppose that X1, X2, ..., Xn are i.i.d. with densitry function f (x; 0) = e-(x-0), x20. (a) Find a sufficient statistic for 0. (b) Is it minimally sufficent

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