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a 2. Let X1, ..., Xn denote a random sample of size n > 2 from a distribution with p.d.f. f(x; 0) = 6e-Ox, 0 < x < 0o, zero elsewhere, and 0 > 0. Then Y = =1 Xi is a sufficient statistic for 0. Prove that (n − 1)/Y is the best statistic for 0. a 1