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Amelia · 2018年04月17日

问一道题：NO.PZ201709270100000301 第1小题 [ CFA II ] 关于Hypothesis的概念

  1. CFA II
  2. Quantitative

* 问题详情，请 查看题干

问题如下图：

    

选项：

A.

B.

C.

解释：


老师您好，

我不太理解如何设定one tail Hypothesis。 拿这道题来说，即使设定b2>=0 或者b0=0, 做Test的时候都是用(b1-0)/standard error. 那么得到的值都在拒绝域里。那么岂不是如果我们的假设错误的话试验值就错误了吗。




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品职辅导员_小明 · 2018年04月19日

如果原假设是只带等于号的，那么拒绝域是落在两边的，也就是双尾检验。如果原假设是带大于等于或者小于等于，那么拒绝域就是落在一边的，也就是单尾检验。那么同样的阿尔法=5%的显著性，对于双尾检验，拒绝域的面积=2.5%，对于单尾的检验，拒绝域的面积=5%。要注意区分，加油

木木__ · 2019年02月05日

很清楚

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