作者asilvia (哇哈哈~~~)
看板Statistics
標題[問題] 互斥跟型一錯誤的問題
時間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
我的問題是互斥一定是不獨立的，但可以因此說互斥是相依嗎？
還是答案就得選e呢？c、d應該不可能是答案吧...
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.
因為一般無法控制型II錯誤的發生機率，而且當型I錯誤率下降時型II錯誤率會上升
除非樣本數增加之類的，所以答案是要選擇d嗎？控制型I就等於控制型II？
麻煩請會的人多多請教！謝謝^^
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