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

维克多周 · 2020年06月14日

问一道题:NO.PZ2017092702000123 [ CFA I ]

问题如下:

A hypothesis test for a normally-distributed population at a 0.05 significance level implies a:

选项:

A.

95% probability of rejecting a true null hypothesis.

B.

95% probability of a Type I error for a two-tailed test.

C.

5% critical value rejection region in a tail of the distribution for a one-tailed test.

解释:

C is correct.

For a one-tailed hypothesis test, there is a 5% critical value rejection region in one tail of the distribution.

请问,confidence lnterval不是就代表是双尾吗?为什么c还是对的呢?
1 个答案

星星_品职助教 · 2020年06月14日

同学你好,

confidence lnterval代表是双尾没问题,但这道题考察的是 hypothesis test 。假设检验与置信区间是不同的考点。C选项考察的是“假设检验”下的单尾检验,并不涉及置信区间。

本题题干可以概括为:假设检验里的0.05 significance level代表的是什么意思。C选项的描述为对于单尾检验来说,单尾的拒绝域为5%,这个描述是正确的。

如果是考察置信区间,正确的描述为0.05 significance level代表的代表的是95%的置信区间,即两侧尾部总面积为5%,单侧尾部面积为2.5%。

  • 1

    回答
  • 1

    关注
  • 435

    浏览
相关问题

NO.PZ2017092702000123 问题如下 A hypothesis test for a normally-stributepopulation a 0.05 significanlevel implies A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I error for a two-tailetest. C.5% rejection region in a tail of the stribution for a one-tailetest. C is correct. For a one-tailehypothesis test, there is a 5% rejection region in one tail of the stribution.对于单尾的检验(for a one-tailetest),单侧拒绝域是5%。 0.05 significanlevel,不就意味着type I error的发生概率是5%吗?

2023-07-31 11:17 1 · 回答

NO.PZ2017092702000123 问题如下 A hypothesis test for a normally-stributepopulation a 0.05 significanlevel implies A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I error for a two-tailetest. C.5% rejection region in a tail of the stribution for a one-tailetest. C is correct. For a one-tailehypothesis test, there is a 5% rejection region in one tail of the stribution.对于单尾的检验(for a one-tailetest),单侧拒绝域是5%。 他这个题目说了normally stribute为什么还选单尾呢 正态分布不是双尾吗

2023-04-08 20:32 1 · 回答

NO.PZ2017092702000123 问题如下 A hypothesis test for a normally-stributepopulation a 0.05 significanlevel implies A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I error for a two-tailetest. C.5% rejection region in a tail of the stribution for a one-tailetest. C is correct. For a one-tailehypothesis test, there is a 5% rejection region in one tail of the stribution.对于单尾的检验(for a one-tailetest),单侧拒绝域是5%。 如何区分单位还是双尾

2022-12-05 21:28 2 · 回答

NO.PZ2017092702000123 问题如下 A hypothesis test for a normally-stributepopulation a 0.05 significanlevel implies A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I error for a two-tailetest. C.5% rejection region in a tail of the stribution for a one-tailetest. C is correct. For a one-tailehypothesis test, there is a 5% rejection region in one tail of the stribution.对于单尾的检验(for a one-tailetest),单侧拒绝域是5%。 請問a錯在哪裡?謝謝

2022-11-07 02:17 1 · 回答

NO.PZ2017092702000123问题如下A hypothesis test for a normally-stributepopulation a 0.05 significanlevel implies a:A.95% probability of rejecting a true null hypothesis. B.95% probability of a Type I error for a two-tailetest. C.5% rejection region in a tail of the stribution for a one-tailetest. C is correct. For a one-tailehypothesis test, there is a 5% rejection region in one tail of the stribution.对于单尾的检验(for a one-tailetest),单侧拒绝域是5%。 请问单双尾的拒绝域和查单尾T表和双尾T表是一个概念吗?

2022-09-03 12:40 1 · 回答