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翻訳と辞書　辞書検索 [ 開発暫定版 ] スポンサード リンク Decision rule ： ウィキペディア英語版 Decision rule In decision theory, a decision rule is a function which maps an observation to an appropriate action. Decision rules play an important role in the theory of statistics and economics, and are closely related to the concept of a strategy in game theory. In order to evaluate the usefulness of a decision rule, it is necessary to have a loss function detailing the outcome of each action under different states. == Formal definition == Given an observable random variable ''X'' over the probability space $\backslash scriptstyle\; (\backslash mathcal,\backslash Sigma,\; P\_\backslash theta)$, determined by a parameter ''θ'' ∈ ''Θ'', and a set ''A'' of possible actions, a (deterministic) decision rule is a function ''δ'' : $\backslash scriptstyle\backslash mathcal$→ ''A''. 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Decision rule」の詳細全文を読む スポンサード リンク 翻訳と辞書 : 翻訳のためのインターネットリソース Copyright(C) kotoba.ne.jp 1997-2016. All Rights Reserved.