问题如下图:
选项:
A.
B.
C.
解释:
提问:老师,这题我查了Z分布表,最接近0.99的这个数字不是0.9901,是0.8389诶。请问这个单尾的Z分布表是怎么看?谢谢指教。
菲菲_品职助教 · 2018年10月30日
同学你好,我选取了部分z分布表如下:
在图上我们就能找到对应的数0.9901,然后对应去找纵轴和横轴的数是2.33(纵轴是2.30,横轴对应0.03,所以加在一起就是2.33)。
我知道你为什么查错了,因为你在表上直接按纵轴0.90,横轴0.09去查表了对吧。但是我们要理解这个查表的方式,中间这些四位数的代表的就是概率,就是置信水平,即B选项的99%。所以我们要先在中间这些概率值里面找到跟0.99最接近的一个数,即0.9901,然后在对应横轴纵轴找到对应的z值。下次查表的时候要注意啦~
kevinzhu · 2019年11月10日
那我想问一下双尾检验的话取哪个数字?
NO.PZ2015120604000131问题如下Whiof the following scriptions is the least accurate about hypothesis testing?A.A Type II error refers to fail to rejewhen the null is false.B.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.58.C.One minus the probability of a Type II error equals the power of test .B is correct.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.332.33不应该是one-tailetest with significant level of 2%吗
NO.PZ2015120604000131问题如下 Whiof the following scriptions is the least accurate about hypothesis testing?A.A Type II error refers to fail to rejewhen the null is false.B.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.58.C.One minus the probability of a Type II error equals the power of test .B is correct.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.33 Type II error=1-power of test,这说的就是c吧,为什么c不对
NO.PZ2015120604000131问题如下Whiof the following scriptions is the least accurate about hypothesis testing?A.A Type II error refers to fail to rejewhen the null is false.B.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.58.C.One minus the probability of a Type II error equals the power of test .B is correct.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.33不懂B,容易搞混。麻烦详细说下。Z统计不都是双尾吗?为啥会有单尾的。另外,为啥用1%折合单尾0.5%,而不是2%
NO.PZ2015120604000131问题如下Whiof the following scriptions is the least accurate about hypothesis testing?A.A Type II error refers to fail to rejewhen the null is false.B.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.58.C.One minus the probability of a Type II error equals the power of test .B is correct.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.33老师,我是用排除法选的B,看了其他同学的问题和您的回复,99% a是0.01对应双尾是2.58,那单尾就是0.005?这怎么查出来的呢
NO.PZ2015120604000131 问题如下 Whiof the following scriptions is the least accurate about hypothesis testing? A.A Type II error refers to fail to rejewhen the null is false. B.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.58. C.One minus the probability of a Type II error equals the power of test . B is correct.A one-tailetest with a significanlevel of 1% hz-criticvalues of 2.33 POWER OF TEST 就是test 步骤三么 计算公式那步么。怎么理解C