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

返回

izzyli · 2021年11月06日

没有明白B为何不对，请帮忙解答。谢谢。

  1. CFA I
  2. Quantitative

NO.PZ2015120604000132

问题如下：

Which of the following is the most accurate statements about hypothesis testing?

选项：

A.

The calculated z-statistic for a test of a sample variance when the population variance isknown as: z= X ¯ − μ 0 σ/ n (σ2 is the variance).

B.

If the computed z-statistic = -3 and the critical z-value = -2, the null hypothesis should be accepted.

C.

the probability of the Type I error equals the significance level.

解释：

C is correct.

The z-statistic is used for the test of a sample mean not variance .

If the computed z-statistic = -3 and the critical z-value = -2, the null hypothesis should be rejected.

没有明白B为何不对，请帮忙解答。谢谢。

添加评论
1 个答案

星星_品职助教 · 2021年11月06日

同学你好，

拒绝原假设的原则是|test statistic|＞|critical value|，B选项符合这一情况，所以应该拒绝而不是接受原假设。

  • 1

    回答

  • 0

    关注

  • 615

    浏览
相关问题

NO.PZ2015120604000132问题如下Whiof the following is the most accurate statements about hypothesis testing?A.The calculatez-statistic for a test of a single varianis known as: z= X ¯ − μ 0 σ/ n (σ2 is the variance).B.If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulaccepteC.the probability of the Type I error equals the significanlevel. C is correct. The z-statistic is usefor the test of the menot varian .If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulrejecte 为什么不选A？没看明白

2024-11-06 16:56 1 · 回答

NO.PZ2015120604000132问题如下 Whiof the following is the most accurate statements about hypothesis testing?A.The calculatez-statistic for a test of a single varianis known as: z= X ¯ − μ 0 σ/ n (σ2 is the variance).B.If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulaccepteC.the probability of the Type I error equals the significanlevel. C is correct. The z-statistic is usefor the test of the menot varian .If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulrejecte ​type 1 error等于显著性水平，请问是怎么推导出来的？还有A，明白是检验均值的，想确认下关于Z statistic的计算公式是对的吗？

2024-04-11 17:02 1 · 回答

NO.PZ2015120604000132问题如下Whiof the following is the most accurate statements about hypothesis testing?A.The calculatez-statistic for a test of a single varianis known as: z= X ¯ − μ 0 σ/ n (σ2 is the variance).B.If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulaccepteC.the probability of the Type I error equals the significanlevel. C is correct. The z-statistic is usefor the test of the menot varian .If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulrejecte a怎么错了 麻烦下

2023-12-20 23:09 1 · 回答

NO.PZ2015120604000132 If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulaccepte the probability of the Type I error equals the significanlevel. C is correct. The z-statistic is usefor the test of a sample menot varian. If the computez-statistic = -3 anthe criticz-value = -2, the null hypothesis shoulrejecte 请问type1 error课上有讲到吗？好像没有吧

2022-02-02 16:31 1 · 回答