2021年備考CFA每日一練來了，在數(shù)量分析中是有很多的知識(shí)點(diǎn)的，那在CFA考試中你能不能做對(duì)這道CFA考試題呢？

Which of the following statements is correct with respect to the null hypothesis?

A. It is considered to be true unless the sample provides evidence showing it is false.

B. It can be stated as "not equal to" provided the alternative hypothesis is stated as "equal to."

C. In a two-tailed test, it is rejected when evidence supports equality between the hypothesized value and population parameter.


答案：A is correct.

The null hypothesis is the hypothesis to be tested. The null hypothesis is considered to be true unless the evidence indicates that it is false, in which case the alternative hypothesis is accepted.

解題思路：

A選項(xiàng)說的是，如果沒有證據(jù)證明原假設(shè)是錯(cuò)誤的，那么就認(rèn)為原假設(shè)是真的。這個(gè)描述是正確的。

B選項(xiàng)的意思是，原假設(shè)可以是包含“≠”符號(hào)的，備擇假設(shè)可以是包含“=”符號(hào)的，這是錯(cuò)誤的，我們一般認(rèn)為“=”都是存在在原假設(shè)中的。

C選項(xiàng)說的是，在雙尾檢驗(yàn)中，當(dāng)證據(jù)證明假設(shè)值跟總體參數(shù)相同時(shí)拒絕原假設(shè)，這是錯(cuò)誤的。原版書的描述是：We reject the null in favor of the alternative if the evidence indicates that the population parameter is either smaller or larger than θ0.

就是說，當(dāng)證據(jù)證明假設(shè)值跟總體參數(shù)相同時(shí)，我們應(yīng)該不拒絕原假設(shè)。所以C選項(xiàng)錯(cuò)誤。

在備考中你是不是正是需要CFA考試題呢？這邊有CFA專題練習(xí)，有需要的考生可以看看給你推薦的課程哦！