題組內容
3. (15%) Let $X_1, X_2, \ldots, X_n$ be a random sample from the pdf $$f(x|\theta) = \theta x^{-2}, \ 0 < \theta \le x \le \infty.$$
a. (5%) Find a sufficient statistic of \( \theta \).
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3. (15%) Let $X_1, X_2, \ldots, X_n$ be a random sample from the pdf $$f(x|\theta) = \theta x^{-2}, \ 0 < \theta \le x \le \infty.$$
a. (5%) Find a sufficient statistic of \( \theta \).