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🐚 · 2022年06月24日

B为什么不正确

  1. CFA I
  2. Quantitative

NO.PZ2015120604000150

问题如下：

Evelyn Smith is studying about the relationship of the χ2-distribution and the F-distribution. Which of the following conclusion is most appropriate?

选项：

A.

Both of their variances are smaller than their means.

B.

Both of them are symmetrical.

C.

Both of them can not be negative.

解释：

C is correct.

The F-distribution and the χ2-distribution are positive and they are asymmetical. There is no solid relationship between the means and variances of this two distributions.

chi square和F都是asymmetric

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1 个答案

星星_品职助教 · 2022年06月24日

同学你好，

卡方分布和F分布都不是对称分布，所以B选项说的这两者都是对称分布（symmetrical）就错误了。

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NO.PZ2015120604000150问题如下Evelyn Smith is stuing about the relationship of the χ2-stribution anthe F-stribution. Whiof the following conclusion is most appropriate?A.Both of their variances are smaller ththeir means.B.Both of them are symmetrical.C.Both of them cnot negative.C is correct.The F-stribution anthe χ2-stribution are positive anthey are asymmetical. There is no solirelationship between the means anvariances of this two stributions.老师，请问A为什么不对？

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