问一道题：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.

想问下这道题怎么理解？

答案中A的kurtosis=4 B的kurtosis=8 C的kurtosis=3 D的kurtosis小于3，最小的不是应该选D吗？我觉得我没有读懂这道题目要问我们的是什么？这道题的题目麻烦老师讲下

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1 个答案

袁园_品职助教 · 2020年07月23日

同学你好！

这道题答案是选D的吧？

一般情况下尖峰肥尾，矮峰瘦尾，所以矮峰分布出现极端值的可能性低

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问一道题：NO.PZ2016062402000009

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