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wowo · 2024年09月12日

这个a和b是不是都是对的啊

NO.PZ2018062001000003

问题如下:

The characteristic of a return distribution is frequent small gains and several extreme losses. Which of the following options is correct?

选项:

A.

The distribution has a positive skewness, and the mean is greater than the median.

B.

The distribution has a negative skewness, and the mean is smaller than the median.

C.

The distribution has a positive skewness, and the mean is smaller than the median.

解释:

We define that a distribution with frequent small gains and a few extreme losses is a negative-skewed distribution.

The characteristics of a negative skewed distribution are:

  1. long tail on the left side and;
  2. mode > median > mean

positive是mean比 median大,negative不就是mean比median小吗?

2 个答案

品职助教_七七 · 2024年09月12日

嗨,努力学习的PZer你好:


@Selyf 的回复是正确的。根据提示的“frequent small gains and several extreme losses”可以确定这只可能是negative skewed的情况,排除A选项的positive skewed。

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Selyf · 2024年09月12日

题干里有说frequent small gains and several extreme losses,符合的只有negative-skewed,当然只有B是对的啦

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2022-11-10 00:53 2 · 回答

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2021-12-16 02:45 1 · 回答

NO.PZ2018062001000003 ...requent small gains ana few extreme losses这个描述的话,afew extreme loses 指的是左侧的细尾吗?

2021-11-14 15:52 1 · 回答

请问A和B是不是都是对的?感觉A和B表述刚好是相反的,如果B对,那A应该也是对的吧?麻烦老师一下,A为什么不对?

2018-10-24 23:20 2 · 回答