问题如下图:
选项:
A.
B.
C.
解释:
不懂呀,这道题目详细讲解一下吧,老师
菲菲_品职助教 · 2018年10月09日
同学你好,根据何老师在基础班的讲解,我们知道Type I error为“去真”,即原假设为真,我们拒绝了它,所以等同于一个小概率事件发生的概率,即α,significance level。所以第一步,significance level变大,可以得到Type I error发生的概率也同时变大。再来看Type II error,“存伪”,即原假设为假,但我们没有拒绝它。我们知道,若第一类错误发生的概率上升,第二类错误发生的概率会下降。为什么呢,因为第一类错误发生的概率上升代表着significance level即α上升,我们越容易去拒绝原假设,也就意味着我们越不容易去接受一个错误的原假设,所以第二类错误发生的概率会下降。综上所述,答案选择B选项。
NO.PZ2018062001000014问题如下All else equal, a larger significant level incates:A.A higher probability of type I error antype II error.B.A higher probability of type I error anlower probability of type II error.C.A lower probability of type I error anhigher probability of type II error.B is correct.The significant level of a test is the probability of a Type I error. Therefore a larger significant level means a higher probability of Type I error.Type II error occurs when we fail to rejea false null hypothesis. It will smaller if significant level of a test is larger, all else equal.我们越容易去拒绝原假设,也就意味着我们越不容易去接受一个错误的原假设。这句话怎么理解啊,可以举一个例子吗?
NO.PZ2018062001000014问题如下All else equal, a larger significant level incates:A.A higher probability of type I error antype II error.B.A higher probability of type I error anlower probability of type II error.C.A lower probability of type I error anhigher probability of type II error.B is correct.The significant level of a test is the probability of a Type I error. Therefore a larger significant level means a higher probability of Type I error.Type II error occurs when we fail to rejea false null hypothesis. It will smaller if significant level of a test is larger, all else equal.请问老师significant level,confinlevel,及p value的区别可以讲解一下吗?谢谢.
significanlevel 越大说明 α 越大,在其他相等的情况下,不就意味着x-μ/x/根号下n,n变大了? n变大了,不是typeI 和type II 都变下?
没有问题ji及答案,请修正。谢谢。