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jvniki · 2022年12月05日

No.PZ2018062016000119 (选择题)

  1. CFA I
  2. Quantitative

NO.PZ2018062016000119

问题如下：

which of the following statement is most likely correct?

选项：

A.

95% confidence level is that means we have 95% probably reject H0

B.

Test statistic is calculated with the population data

C.

Critical value is determined by the significantly level

解释：

C is correct. 95% confidence level is that means we have 95% probably not reject H0,test statistic is calculated with the sample data.

B，我听课说的就是检验的总体呀 咋不对了，C是啥意思啦

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已采纳答案

星星_品职助教 · 2022年12月06日

同学你好，

1）B选项说的是检验统计量（Test statistic）是根据总体数据计算出来的，这个描述是错误的。检验统计量是根据抽出的样本的数据计算的；

2）假设检验针对的是总体，也就是原假设和备择假设检验的都是总体参数，而非样本统计量。这是其他的考点。

3）C选项意为关键值（critical value）是由significance level决定的，这个说法是正确的。例如正态分布下，significance level=5%的双尾检验即可以对应出关键值为±1.96.

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