作者mangogogo (mangogo)
看板Statistics
标题Re: [问题] 问一题机率分配
时间Sun Feb 26 18:18:02 2006
※ 引述《lovekyoko (威爷帅毙罗)》之铭言：
: A quality control plan an assemble line involves sampling n finishing
: items per day and counting,the number of defectives. If p denote the
: probablity of observing a defective then Y has a binomial distribution ,
: assuming that a large number of items are produced by theline But p varies
: form day to day and is assumed to have a uniform distribution on the interval
: from 0 to 1
: a Find the unconditional probablity mass function of Y
: b Find the expected value and variance of Y
: 请会的帮我解题一下 Orz
Y|P=p ~Bin(n,p)
P~U(0,1)
f(y,p)=f(y|p)f(p)
fy(y)=∫f(y|p)f(p)dp
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