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庄园monar · 2021年12月25日

讲义上没看到MAD啊

  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。

请问在那一部分能看到？

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2 个答案

星星_品职助教 · 2021年12月25日

好的， 评论收到

庄园monar · 2021年12月25日

找到了，在后面

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