作者asilvia (哇哈哈~~~)
看板Statistics
标题[问题] 互斥跟型一错误的问题
时间Sun Feb 10 22:35:34 2008
1.If A and B are exclusive events with P(A)>0 and P(B)>0,then
(a)A and B are independent events
(b)A and B are dependent events
(c)P(A｜B)>0
(d)P(A)+P(B)=1
(e)none of the above
我的问题是互斥一定是不独立的，但可以因此说互斥是相依吗？
还是答案就得选e呢？c、d应该不可能是答案吧...
2.In hypothesis testing,only type I error rate is controlled by setting the
significant level(α) because
(a)the other error is not important.
(b)the other error never occurs.
(c)we can not control both error rates simultaneously.
(d)controlling type I error rate is equivalent to controlling the other
error rate.
(e)none of the above.
因为一般无法控制型II错误的发生机率，而且当型I错误率下降时型II错误率会上升
除非样本数增加之类的，所以答案是要选择d吗？控制型I就等於控制型II？
麻烦请会的人多多请教！谢谢^^
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