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🌊Yuri🌊 · 2022年12月14日

问

  1. CFA I
  2. Quantitative

NO.PZ2018062016000123

问题如下：

Which of the following statements about one-side hypothesis test is most correct ?

选项：

A.

We reject the null only if the evidence indicates that the population parameter is smaller or larger than the critical value.

B.

Do not have Type I error.

C.

We reject the null only if the evidence indicates that the test statistic is greater than or less than the critical value.

解释：

C is correct. By definition, one-side hypothesis test also called one-tailed hypothesis test, which reject rule is reject the null only if the evidence indicates that the test statistic is greater than or less than the critical value.

a c 选项请问有什么不同？

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1 个答案

星星_品职助教 · 2022年12月14日

同学你好，

拒绝原假设的原则是|test statistic|＞|critical value|，也就是C选项描述的内容。其中test statistic是根据样本计算出来的数值。

A选项的描述为总体参数。总体参数是未知的。如果已知总体参数，也就不需要对其做假设检验了。

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