问题如下图：
选项：
A. 
B. 
C. 
解释可以帮忙翻译下选项什么意思么
星星_品职助教 · 2019年12月04日
同学你好，
这道题的意思是如果一个分布同时有较大的极端值，并且又有很小的均值周围的波动，那么这个分布的特点是什么。
较大的极端值对应着肥尾，而均值周围较小的波动对应着说明峰比较“瘦”，再结合肥尾的特点，这其实就是一个尖峰肥尾的分布。B选项的positive excess kurtosis说明（相对正态分布）有正的excess kurtosis，也就是尖峰。这个描述是正确的。C选项的描述相当于低峰。而这个分布的特点无法看出来是左偏还是右偏，所以A选项不正确。加油
胖婷肥周 · 2023年02月08日
均值周围较小的波动对应着说明峰比较“瘦 老师，尖峰肥尾这些理解，但是为什么“均值周围较小的波动对应着说明峰比较“瘦”呢？
NO.PZ2015120604000056 问题如下 Whiof the following scriptions about leptokurtic is most appropriate? A.A stribution of returns thhextremely large viations from the meis positively skewe B.A stribution of returns thhextremely large viations from the mehpositive excess kurtosis. C.A stribution of returns thhextremely large viations from the mehnegative excess kurtosis. B is correctLeptokurtic refers to a stribution thha fatter tail tha normstribution(i.e.positive excess kurtosis). 为啥是偏离于均值
NO.PZ2015120604000056问题如下 Whiof the following scriptions about leptokurtic is most appropriate? A.A stribution of returns thhextremely large viations from the meis positively skeweB.A stribution of returns thhextremely large viations from the mehpositive excess kurtosis.C.A stribution of returns thhextremely large viations from the mehnegative excess kurtosis. B is correctLeptokurtic refers to a stribution thha fatter tail tha normstribution(i.e.positive excess kurtosis). 这个是问L，尖峰肥尾；它的异常值是要比P（低峰瘦尾）要多的；B的答案是L跟自己比，因为excess K＞0的就是L，两个表达的是一个东西，不存在谁比谁的异常值多；C的答案是指题干的L，要比excesK＜0也就是P（低峰瘦尾）的异常值多，这样的是对的。所以不是应该选C吗
NO.PZ2015120604000056问题如下Whiof the following scriptions about leptokurtic is most approriate?A.A stribution of returns thhextremely large viations from the meis positively skeweB.A stribution of returns thhextremely large viations from the mehpositive excess kurtosis.C.A stribution of returns thhextremely large viations from the mehnegative excess kurtosis. B is correctLeptokurtic refers to a stribution thha fatter tail tha normstribution(i.e.positive excess kurtosis). 谢谢。。。。。。。。。。。
NO.PZ2015120604000056 问题如下 Whiof the following scriptions about leptokurtic is most approriate? A.A stribution of returns thhextremely large viations from the meis positively skewe B.A stribution of returns thhextremely large viations from the mehpositive excess kurtosis. C.A stribution of returns thhextremely large viations from the mehnegative excess kurtosis. B is correctLeptokurtic refers to a stribution thha fatter tail tha normstribution(i.e.positive excess kurtosis).
NO.PZ2015120604000056问题如下Whiof the following scriptions about leptokurtic is most approriate? A.A stribution of returns thhextremely large viations from the meis positively skewe B.A stribution of returns thhextremely large viations from the mehpositive excess kurtosis. C.A stribution of returns thhextremely large viations from the mehnegative excess kurtosis. B is correctLeptokurtic refers to a stribution thha fatter tail tha normstribution(i.e.positive excess kurtosis). 感觉A和B都正确。 请问下老师A的错误是在哪里？