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

六粒橙 · 2018年07月31日

问一道题:NO.PZ2015120604000131 [ CFA I ]

问题如下图:

    

选项:

A.

B.

C.

解释:

老师你好,请问B中2.33怎么得出的? α=1%时,confidence interval = 99%那么 Z分布中对应的critical value 不是2.58吗?请问我哪里理解错了。谢谢!


2 个答案
已采纳答案

菲菲_品职助教 · 2018年07月31日

同学你好,这个选项说的是在单尾检验下,显著性水平(α)=1%时,Z分布的临界值等于多少,这时候就要查标准正态分布表来得到这个值。所以在表中找到最接近0.99的这个数字(0.9901),可知对应的Z临界值为2.33。你说的这个2.58不是运用在这里的。要运用2.58这个值的地方是在置信区间(confidence intervals)那边,是指大概有99%的数是落在均值周围2.58个标准差范围内的。跟着道题没有关系哦~

加油~

六粒橙 · 2018年08月01日

明白了 谢谢!!

蓝莓囡囡骑士 · 2018年12月12日

可是题目没有给查表的数据 考试怎么办啊 

菲菲_品职助教 · 2018年12月12日

考试的时候都会给出的哦,不用担心。

  • 2

    回答
  • 1

    关注
  • 360

    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

2022-12-21 08:24 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