作者liliya ()
看板Statistics
标题Re: [问题] 统计的假设检定问题(型I误差)
时间Fri Feb 22 13:42:15 2008
A random sample of 400 voters in a certain city are asked if they
favor an additional 4% gasoline sales tax to provide badly needed
revenues for street repairs. If more than 220 but fewer than 260
favor the sales tax, we shall conclude that 60% of the voters
are for it.
(1) If 60% of the voters favor the incresed tax, what is the type I
error? (2)If actually only 48% of the voters are in favor of the
additional gasoline tax, what is the typeII error?
我知道 型I误差 =P(拒绝H0|H0为真)
但搞不太懂他的H0 欲否定的假设是??? Orz
请问大家 大概的意思 假设是????
谢谢大家的帮忙!! ^^"
A)TypeI error is 0.0094 and TypeII error is 0.0061
B)TypeI error is 0.0046 and TypeII error is 0.0122
C)TypeI error is 0.0046 and TypeII error is 0.0061
D)TypeI error is 0.0094 and TypeII error is 0.0122
参考大家算法 都没有以上的答案耶>"<
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1F：推 mrk:你说的是型二误差耶。o_O 02/22 15:10
2F：→ mrk:阿，我说错了。xD 02/22 15:11
3F：推 bbenson:答案是A吧 0.0 02/22 23:56
4F：→ liliya:可以请问楼上 大概是怎麽算的呢?? @@ 02/23 13:03
5F：推 shortmason:我刚刚算也是算你之前那答案...太诡异了 02/25 20:39