For a hypothesis test with a probability of a Type II error of 60% and a probability of Type I error of 5%,which of the following statements is most accurate? A:the power of the test is 40%,and there is a 5% probability that the test statistic will exceed the critical values. B:there is a 95% probability that the statistic will be between the critical values if this is a two-tail test. C:the power of the test is 55%,and the confidence level is 95% D:there is a 5% probability that the null hypothesis will be rejected when actually true ,and the probability of rejecing the null when it is false is 40% 请问一下A和B为什么错了，书后的答案没有看懂，谢谢了 | 
发表于 2008-6-25 13:50
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