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188宝金博页面版: statisticalinference课件1

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内容提示: Lecture 1: RevisionProbability (Secs 1.2, 1.3, C&B)conditional probability and independenceP?A|B? ?P?A ∩ B?P?B??P?A?P?B?P?B|A?is the conditional probability of A given B.A and B are independent ifP?A ∩ B? ? P?A?P?B?,and if A and B independent, thenP?A|B? ? P?A?Bayes rule: for a partition Aiof the sample spaceP?Ai|B? ?P?B|Ai?P?Ai?∑jP?B|Aj?P?Aj?Random Variables and Distributions (Secs 1.4, 2.1C&B)Let X,Xidenote random variables, ie functions from sample space into the real linePX?X ? xi? ? P??? : X??? ? xi??defines a probability on the range of X, called...

文档格式:PDF | 页数:3 | 浏览次数:40 | 上传日期:2013-03-21 12:18:58 | 文档星级:
Lecture 1: RevisionProbability (Secs 1.2, 1.3, C&B)conditional probability and independenceP?A|B? ?P?A ∩ B?P?B??P?A?P?B?P?B|A?is the conditional probability of A given B.A and B are independent ifP?A ∩ B? ? P?A?P?B?,and if A and B independent, thenP?A|B? ? P?A?Bayes rule: for a partition Aiof the sample spaceP?Ai|B? ?P?B|Ai?P?Ai?∑jP?B|Aj?P?Aj?Random Variables and Distributions (Secs 1.4, 2.1C&B)Let X,Xidenote random variables, ie functions from sample space into the real linePX?X ? xi? ? P??? : X??? ? xi??defines a probability on the range of X, called the induced probability. AndFX?x? ? PX?X ≤ x?is the distribution function of X. Properties of F?If two random variables X and Yare identically distributed, then FX ? FYIf X is a continuous random variable and FXis differentialble, thenFX?x? ? ?−?xfX?t?dtand fXis called the density of X or the probability density function (pdf). NotefX ≥ 0and?−???fX?t?dt ? 1.

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