Probability that evaluates the degree of uncertainty of an event's occurrence, incorporating subjective factors. Also known as subjective probability. If the subjective probability of an event is common and does not depend on the individual making the evaluation, it is called objective probability. Thus, the probability of each correct number on a dice is 1/6, which is an objective probability. The probability of each incorrect number on a dice is subjective because it differs depending on the subject making the evaluation. For example, if the dice are rolled 1,000 times and the probability of each number is reevaluated using the number of times each number has appeared, it will still be a subjective probability because it differs depending on the subject, but it will be less subjective than the original probability. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
事象の生起の不確実性の程度を主観を混ぜて評価した確率。主観的確率ともいう。ある事象の主観確率が評価した個人に依存せず共通であれば,それは客観(的)確率とよばれる。したがって,正しいさいころの各目の確率が1/6というのは客観確率である。正しくないさいころの各目の確率は,評価する主体により異なるので主観確率である。たとえば,このさいころを1000回投げ,各目の出現回数を情報として再評価された各目の確率も,主体により異なるので依然として主観確率であるが,はじめの確率よりも主観性が減少している。
出典 株式会社平凡社世界大百科事典 第2版について 情報 |
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