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stywow · 2017年12月12日

问一道题:NO.PZ2017092702000124 [ CFA I ]

问题如下图:
选项:
A.
B.
C.
解释:
1 个答案

源_品职助教 · 2017年12月13日

同学,提问的时候要说明具体哪句话(或者步骤)看不懂或者不认同,这样我们才好给你做出针对性的解答。

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NO.PZ2017092702000124 问题如下 Whiof the following statements regarng a one-tailehypothesis test is correct? A.The rejection region increases in size the level of significanbecomes smaller. B.A one-tailetest more strongly reflects the beliefs of the researcher tha two tailetest. C.The absolute value of the rejection point is larger ththof a two-tailetest the same level of significance. B is correct. One-tailetests in whithe alternative is \"greater than\" or \"less than\" represent the beliefs of the researcher more firmly tha \"not equto\" alternative hypothesis一个双尾检验是例如均值是否等于0,此时检验结果无论是远大于0还是远小于0都可以拒绝原假设。并没有一个明确的方向。而一个单尾检验有确定的方向,例如检验均值是否大于0。此时只有均值远小于0才可以拒绝原假设。所以单尾的检验更有针对性,反应出来检验者对于检验的方向和信心更强。 A为什么是错的呢?

2024-04-30 20:36 1 · 回答

NO.PZ2017092702000124 问题如下 Whiof the following statements regarng a one-tailehypothesis test is correct? A.The rejection region increases in size the level of significanbecomes smaller. B.A one-tailetest more strongly reflects the beliefs of the researcher tha two tailetest. C.The absolute value of the rejection point is larger ththof a two-tailetest the same level of significance. B is correct. One-tailetests in whithe alternative is \"greater than\" or \"less than\" represent the beliefs of the researcher more firmly tha \"not equto\" alternative hypothesis一个双尾检验是例如均值是否等于0,此时检验结果无论是远大于0还是远小于0都可以拒绝原假设。并没有一个明确的方向。而一个单尾检验有确定的方向,例如检验均值是否大于0。此时只有均值远小于0才可以拒绝原假设。所以单尾的检验更有针对性,反应出来检验者对于检验的方向和信心更强。 老师能不能一下A是什么意思

2022-05-19 20:56 1 · 回答

NO.PZ2017092702000124 问题如下 Whiof the following statements regarng a one-tailehypothesis test is correct? A.The rejection region increases in size the level of significanbecomes smaller. B.A one-tailetest more strongly reflects the beliefs of the researcher tha two tailetest. C.The absolute value of the rejection point is larger ththof a two-tailetest the same level of significance. B is correct. One-tailetests in whithe alternative is \"greater than\" or \"less than\" represent the beliefs of the researcher more firmly tha \"not equto\" alternative hypothesis一个双尾检验是例如均值是否等于0,此时检验结果无论是远大于0还是远小于0都可以拒绝原假设。并没有一个明确的方向。而一个单尾检验有确定的方向,例如检验均值是否大于0。此时只有均值远小于0才可以拒绝原假设。所以单尾的检验更有针对性,反应出来检验者对于检验的方向和信心更强。 我觉得应该是当level of significan变小,比方说从5%到1%,那rejection region 的size是变小的啊

2022-04-26 10:16 1 · 回答

NO.PZ2017092702000124 A one-tailetest more strongly reflects the beliefs of the researcher tha two tailetest. The absolute value of the rejection point is larger ththof a two-tailetest the same level of significance. B is correct. One-tailetests in whithe alternative is \"greater than\" or \"less than\" represent the beliefs of the researcher more firmly tha \"not equto\" alternative hypothesis 一个双尾检验是例如均值是否等于0,此时检验结果无论是远大于0还是远小于0都可以拒绝原假设。并没有一个明确的方向。 而一个单尾检验有确定的方向,例如检验均值是否大于0。此时只有均值远小于0才可以拒绝原假设。 所以单尾的检验更有针对性,反应出来检验者对于检验的方向和信心更强。 请问老师可以说一下a 吗?

2021-12-19 01:20 1 · 回答

NO.PZ2017092702000124 老师能不能详细一下b和c 谢谢!

2021-11-08 14:17 1 · 回答