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TheaYu · 2020年04月23日

问一道题：NO.PZ2018062016000132 [ CFA I ]

  1. CFA I
  2. Quantitative

问题如下：

Claire believes that the mean price of the commercial residential building is greater than $155,000. The population standard deviation is $25,000. A random sample of 36 commercial residential buildings in the area has a mean price of $159,750. Claire conduct the hypothesis test at a 1% level of significance. The value of the calculated test statistic is closet to:

选项：

A.

1.14.

B.

0.19.

C.

1.33.

解释：

A is correct. This is a one-tailed hypothesis since the alternative hypothesis only allows values greater than the hypothesized value. z=159750-155000/(25000/6)=1.14

题目中的1%显著性水平是迷惑条件吗？还是我可以通过这个单尾的1%倒推出答案？
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1 个答案

星星_品职助教 · 2020年04月25日

同学你好，

这道题里的1%没什么用。题目只需要求到计算检验统计量即可。

如果后续还需要判断假设检验的结果，就需要根据1%对应出critical value了

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NO.PZ2018062016000132 问题如下 Claire believes ththe mepriof the commerciresintibuilng is greater th$155,000. The population stanrviation is $25,000. A ranm sample of 36 commerciresintibuilngs in the area ha mepriof $159,750. Claire conthe hypothesis test a 1% level of significance. The value of the calculatetest statistic is closet to: A.1.14. B.0.19. C.1.33. A is correct. This is a one-tailehypothesis sinthe alternative hypothesis only allows values greater ththe hypothesizevalue. z=159750-155000/(25000/6)=1.14 这个25000不是总体样本方差嘛？population不是总体方差嘛？请老师解惑下。

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