干扰项？

NO.PZ2015120604000146

问题如下：

Here is a table discribing sample statistics from two bonds' rate of return which are both normally distributed over the past decades. If an investor is considering whether the variance of bond A is greater than 3.24%,

which of the following conclusion is least appropriate (significant level=5%) ?

选项：

It is appropriate to use the F-test.

The hypothesis is : $H_{0} : σ^{2} \leq 3.24 %.$

It is appropraite to use the chi-square test.

解释：

The chi-square test is used to test hypotheses concerning a single population variance.So C is correct.

The null hypothesis can place in whatever you want to reject, so B is correct.

题干问选择least appropriate,So choose A.

sample 2在此处是干扰项吧？可以这么理解吗？谢谢

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1 个答案

品职助教_七七 · 2024年09月15日

嗨，努力学习的PZer你好：

是的，这道题只涉及到bond A，也就是sample 1的情况。

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努力的时光都是限量版，加油！

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干扰项？

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