作者liliya ()
看板Statistics
标题[问题] 统计的机率问题
时间Mon Jan 28 20:57:16 2008
A truth sergum(血清) given to suspect is known to be
90% reliable when the person is guilty(有罪) and
99% reliable when the person is innocent(无罪)
In other words,10% of guilty are judged innocent by the serum
and 1% of the innocent are judged guilty.
If the suspect was selected from a group of suspects of which only
5% have ever committed a crime, and the serum indicates that he
is guilty, What is the probability that he is innocent?
算无罪的机率问题
但是不知道该怎麽假设才对>"<
怎麽假设都觉得怪怪 不合理
请问 大家 该怎麽假设呢??
後续我可以自己算就好^^
谢谢大家了~
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1F：推 chrisjon:这应该是贝氏定理的应用，再试试吧 01/29 02:16