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Sofia nice · 2024年02月21日

选项麻烦翻译一下

  1. CFA I
  2. Quantitative

NO.PZ2015120604000056

问题如下：

Which of the following descriptions about leptokurtic is most appropriate?

选项：

A.

A distribution of returns that has extremely large deviations from the mean is positively skewed.

B.

A distribution of returns that has extremely large deviations from the mean has positive excess kurtosis.

C.

A distribution of returns that has extremely large deviations from the mean has negative excess kurtosis.

解释：

B is correct

Leptokurtic refers to a distribution that has a fatter tail than a normal distribution(i.e.positive excess kurtosis).

为啥是偏离于均值

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品职助教_七七 · 2024年02月21日

嗨，爱思考的PZer你好：


kurtosis描述的是分布尾部（tail）的情况。

“ extremely large deviations from the mean”指的是和均值差距很大的值，也就是极端值。极端值位于分布的尾部区域，有这种极端值就意味着肥尾，也就是leptokurtic。

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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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