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小妍 · 2019年07月14日

为什么不直接用marginal var *p计算?考试时如何判断用什么公式进行计算?

问题如下图:

选项:

A.

B.

C.

D.

解释:

为什么不直接用marginal var *p计算?考试时如何判断用什么公式进行计算?问一道题:NO.PZ2016071602000011 [ FRM II ]

1 个答案

品职答疑小助手雍 · 2019年07月14日

同学你好,marginal var*P只是个估算的方式,这题中cvar最精确的算法就是直接拿总的减去P1单独的。

至于什么时候能用什么时候不能用,虽然不能一概而论,不过主要看题目给出的已知条件,给出来和整体的相关系数的之类的时候用那个公式多一些。

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