问题如下图：
选项：
A. 
B. 
C. 
D. 
解释：
尖峰瘦尾不是落在极值的可能性低？为什么选D？
NO.PZ2016062402000009 Whitype of stribution proces the lowest probability for a variable to exceea specifieextreme value this greater ththe mean, assuming the stributions all have the same meanvariance? A leptokurtic stribution with a kurtosis of 4 A leptokurtic stribution with a kurtosis of 8 A normstribution A platykurtic stribution A platykurtic stribution hkurtosis less th3, less ththe normp.f. Because all other answers have higher kurtosis, this proces 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？
Whitype of stribution proces the lowest probability for a variable to exceea specifieextreme value this greater ththe mean, assuming the stributions all have the same meanvariance? A leptokurtic stribution with a kurtosis of 4 A leptokurtic stribution with a kurtosis of 8 A normstribution A platykurtic stribution A platykurtic stribution hkurtosis less th3, less ththe normp.f. Because all other answers have higher kurtosis, this proces 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 kurtosis小于3，最小的不是应该选？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
Whitype of stribution proces the lowest probability for a variable to exceea specifieextreme value this greater ththe mean, assuming the stributions all have the same meanvariance? A leptokurtic stribution with a kurtosis of 4 A leptokurtic stribution with a kurtosis of 8 A normstribution A platykurtic stribution A platykurtic stribution hkurtosis less th3, less ththe normp.f. Because all other answers have higher kurtosis, this proces the lowest extreme values. 讲义里的这两张图，为什么是反的啊？一个是尖峰瘦尾，一个是尖峰肥尾，求解！！
