开发者:上海品职教育科技有限公司 隐私政策详情

应用版本:4.2.11(IOS)|3.2.5(安卓)APP下载

Helen 🎈 · 2022年12月21日

B选项

NO.PZ2015120604000131

问题如下:

Which of the following descriptions is the least accurate about hypothesis testing?

选项:

A.

A Type II error refers to fail to reject when the null is false.

B.

A one-tailed test with a significance level of 1% has z-critical values of 2.58.

C.

One minus the probability of a Type II error equals the power of test .

解释:

B is correct.

A one-tailed test with a significance level of 1% has z-critical values 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

2 个答案

星星_品职助教 · 2022年12月21日

@Helen 🎈

1)原回复回答的即为应如何从0.005对应出关键值2.58,本题不需查表;

2)如果查表,则可找到左尾面积为0.05对应出-2.58,或左尾面积为0.995对应出+2.58.

以后者为例,在表格中找到最接近0.9950的0.9949和0.9951,可以反向对应出此时关键值大概在2.575左右,即2.58.

星星_品职助教 · 2022年12月21日

同学你好,

0.01是双尾的总面积,根据对称性,此时单侧的尾部面积就是0.01/2=0.005。

所以双尾0.01对应的关键值2.58,就也是单尾0.005所对应的关键值。

Helen 🎈 · 2022年12月21日

我就是不知道0.005怎么查?表上有吗?

  • 2

    回答
  • 0

    关注
  • 357

    浏览
相关问题

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

2024-07-14 13:35 1 · 回答

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

2023-11-10 09:11 1 · 回答

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%

2023-06-05 17:47 2 · 回答

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

2022-09-14 15:57 1 · 回答