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珈柠 · 2024年08月04日

CFA｜

  1. CFA I
  2. Quantitative

NO.PZ2022123001000123

问题如下：

Independent samples drawn from normally distributed populations exhibit the following characteristics:


Assuming that the variances of the underlying populations are equal, the pooled estimate of the common variance is 2,678.05. The t-test statistic appropriate to test the hypothesis that the two population means are equal is closest to:

选项：

A.

0.94

B.

1.90

C.

0.29

解释：

The t-statistic for the given information (normally distributed populations, population variances assumed equal) is calculated as:


这题怎么才能想到用这样的公式呢？

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品职助教_七七 · 2024年08月04日

嗨，从没放弃的小努力你好：


题干中给了“variances of the underlying populations are equal”和“the pooled estimate”。这个背景下的t统计量是唯一的，没有其他的可能。

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虽然现在很辛苦，但努力过的感觉真的很好，加油！

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