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西红柿面 · 2024年03月08日

为什么不选择A呢

  1. CFA II
  2. Quantitative

* 问题详情，请 查看题干

NO.PZ201709270100000306

问题如下：

6. Based on Exhibit 1, Varden’s best answer to Quinni’s question about the F-statistic is:

选项：

A.

both independent variables are significant at the 0.05 level.

B.

neither independent variable is significant at the 0.05 level.

C.

at least one independent variable is significant at the 0.05 level.

解释：

C is correct. Exhibit 1 indicates that the F-statistic of 4.161 is significant at the 0.05 level. A significant F-statistic means at least one of the independent variables is significant.

F-test的H0是所有b都等于0，现在Pvalue非常小所以证明拒绝原假设，所以说b不等于0，那为什么不选A呢？

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1 个答案

品职助教_七七 · 2024年03月09日

嗨，从没放弃的小努力你好：


F test的Ha是至少有一个自变量的系数不为0，也就是C选项的描述。

不是所有自变量的系数都不为0，A选项的描述错误。

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