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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 Luce's choice axiom ： ウィキペディア英語版 Luce's choice axiom In probability theory, Luce's choice axiom, formulated by R. Duncan Luce (1959), states that the probability of selecting one item over another from a pool of many items is not affected by the presence or absence of other items in the pool. Selection of this kind is said to have "independence from irrelevant alternatives" (IIA). ==Overview== Mathematically, the axiom states that the probability of selecting item ''i'' from a pool of ''j'' items is given by: : $P(i)\; =\; \backslash frac\{\backslash sum\_j\{w\_j\}\}$ where ''w'' indicates the weight (a measure of some typically salient property) of a particular item. 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「Luce's choice axiom」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.