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汶珈 · 2023年02月22日

请问这个答案是什么意思呢，能翻译下嘛？没太看懂。

  1. CFA I
  2. Quantitative

NO.PZ2015120604000056

问题如下：

Which of the following descriptions about leptokurtic is most approriate?

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).



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星星_品职助教 · 2023年02月22日

同学你好，

B选项的描述为：

1）leptokurtic对应的分布中，有距离均值较远的极端值，这是在描述分布的尾部情况，说明分布（相比正态分布而言）是肥尾的；

2）leptokurtic对应positive excess kurtosis。

上述两者都是leptokurtic的性质。可参照下方的讲义截图。答案解析即是把这两条性质又描述了一遍。

汶珈 · 2023年02月23日

谢谢！明白了！has extremely large deviations from the mean：说明有远离均值的尾部数据，肥尾情况。has positive excess kurtosis说明比正太分布高，说明是尖峰。

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