kurtosis小于3，大于3怎么解读这个数据。

NO.PZ2016062402000009

问题如下：

Which type of distribution produces the lowest probability for a variable to exceed a specified extreme value that is greater than the mean, assuming the distributions all have the same mean and variance?

选项：

A leptokurtic distribution with a kurtosis of 4

A leptokurtic distribution with a kurtosis of 8

A normal distribution

A platykurtic distribution

解释：

A platykurtic distribution has kurtosis less than 3, less than the normal p.d.f. Because all other answers have higher kurtosis, this produces the lowest extreme values.

讲义中有讲述kurtosis=3，小于3，大于3都是什么分布。这些分布具体有什么含义？只是代表尾巴的概率不同吗？

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品职答疑小助手雍 · 2022年01月27日

同学你好，除了代表尾巴，相应的也代表中间的概率集中度。大于3就是尖峰，小于3就是矮峰，正态的峰度等于3，尖峰对应肥尾，矮峰对应瘦尾。

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kurtosis小于3，大于3怎么解读这个数据。

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