求助胡老师！ black, style, color, 置信区间, 胡老师

FORPAN

胡老师，您好！您在假设检验（B)讲义中的习题10，您说B答案没有道理，可是我不知道自己错在什么地方，我觉得B和D都正确。因为一类错误的概率为5%，我理解就是假设统计量（双尾假设）落在两个临界值之间的概率为95%，意味着置信区间为95%。

如果B的表述有误，怎么修改可以把我理解的这个意思表述出来？拜托老师

 题目如下：

For a hypothesis test with a probability of a tape II error of 60% and a probability of a tape I error of 5%, which of the following is ture:

B)There is a 95% probability that the test statistic will be between the critical value if this is a two-tailed test.

D)There is a 5% probability that the null hypothesis will be rejected when actually true , and the probability of rejecting the null when it is false is 40%.

B)There is a 95% probability that the test statistic will be between the critical value if this is a two-tailed test.

D)There is a 5% probability that the null hypothesis will be rejected when actually true , and the probability of rejecting the null when it is false is 40%.

胡老师

a 5% probability 的理解应该是零假设本身是正确的，即不能拒绝零假设，但是实际上拒绝了的概率。注意，在假设检验中，我们不能说接受零假设，而只能说在多少概率下，不能拒绝零假设。B的陈述是接受零假设的陈述