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Kiki · 2022年12月15日

stock C是右偏,不应该是 有few extreme losses

NO.PZ2018062016000056

问题如下:

Given the table above, which of the following statements is least accurate regarding to the skewness of Stock C?

选项:

A.

The return distribution has a few extreme gains.

B.

The return distribution has a few extreme losses.

C.

The mean return is larger than its median.

解释:

B is correct. The skewness of Stock C is positive,which shows right fat tails. A positive skewed distribution has frequent small losses and a few extreme gains.

题干是选最不正确least accurate的,所以选B。

所以A的说法是错的,B的说法是对的,选不正确的,应该选A吧

1 个答案
已采纳答案

星星_品职助教 · 2022年12月15日

同学你好,

右偏代表分布的右侧尾部有极大值的存在,即右尾有a few extreme gains,所以才把分布整体在往右拉。A选项的描述是正确的。

右偏图像的左尾没有极端值(extreme losses),损失均以small loss的形式存在,所以就是frequent small losses。