sities. Let X₁, X2,..., Xn be a random sample of size n from the density ƒx(x; 0) = 0(1 + x)−(¹+0) I(0,∞) (x), 0 > 0 Show that the density belongs to the one-parameter exponential class of den- Find a complete sufficient statistic, if there is one. Be able to provide justifica- tion/s why such statistic is complete and sufficient. Find the Cramer-Rao lower bound of the variance for unbiased estimators of 1/0.

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