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粗眉毛辣椒油 · 2024年01月15日

这道题是不是要么超出查表范围，要么无法在表中找出精准的数据？考试中应该怎么做？

  1. FRM I
  2. Quantitative

NO.PZ2020010303000009

问题如下：

Either using a Z table or the Excel function NORM.S.DIST, compute

a. Pr(-1.5 < Z < 0), where Z ∼ N(0, 1)

b. Pr(Z < -1.5), where Z ∼ N(0, 1)

c. Pr(-1.5 < X < 0), where X ∼ N(1, 2)

d. Pr(X > 2), where X ∼ N(1, 2)

e. Pr(W > 12), where W ∼ N(3, 9)

选项：

解释：

a. 43.3%. In Excel, the command to compute this value is NORM.S.DIST(0,TRUE) – NORM.S.DIST(-1.5,TRUE).

b. 6.7%. In Excel, the command to compute this value is NORM.S.DIST(-1.5,TRUE).

c. 20.1%. In Excel, the command to compute this value is NORM.S.DIST((0 – 1)/SQRT(2),TRUE) – NORM.S.DIST((-1.5-1)/SQRT(2),TRUE).

d. 24.0%. In Excel, the command to compute this value is 1 – NORM.S.DIST((2 – 1)/SQRT(2),TRUE).

e. 0.13%. In Excel, the command to compute this value is 1 – NORM.S.DIST((12 – 3)/3,TRUE).

excel function NORM.S.DIST 这是Excel的计算公式吗？这个也需要掌握吗

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1 个答案

李坏_品职助教 · 2024年01月15日

嗨，努力学习的PZer你好：


FRM考试中不可能让你用Excel的，如果考到类似题目，会明确给出你需要用到的概率值。或者给你一部分正态分布的表格，会查表即可。


这个题目只是让你了解正态分布的概率运算方法。

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