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洪铭泉 · 2024年03月03日

选项B里的rang求最大值最小值该怎么求？

  1. CFA I
  2. Quantitative

NO.PZ2018062016000051

问题如下：

Having collected mean returns for the three stocks, the analyst is now concerned about evaluating dispersion.Which of the following statements is least accurate?

选项：

A.

Based on the variance,Stock A has the highest dispersion.

B.

Based on the range,Stock C has the lowest dispersion.

C.

Based on the mean absolute deviation(MAD),Stock B has the highest dispersion.

解释：

C is correct.

MAD(A)=(|-39-2.4|+|31-2.4|+|12-2.4|+|-4-2.4|+|12-2.4|)/5=19.12

MAD(B)=(|-35-4.4|+|25-4.4|+|15-4.4|+|0-4.4|+|17-4.4|)/5=17.52

MAD(C)=(|6-2|+|-8-2|+|11-2|+|-2-2|+|3-2|)/5=5.6

Based on the MAD,Stock A has the highest dispersion.

该题题目是要求least accurate，即最不正确的。所以选择C。

选项B里的rang求最大值最小值该怎么求？

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1 个答案

品职助教_七七 · 2024年03月03日

嗨，努力学习的PZer你好：


不需要求，直接表格里读数找最大和最小即可。

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努力的时光都是限量版，加油！

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