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YYJ · 2024年04月09日

这个t表 考试会给么 会明确表格是单尾还是双尾吗

  1. CFA I
  2. Quantitative

NO.PZ2015120604000137

问题如下：

Ida Lee and his team collect a lot of analysis of statistical data about the car market .According to the data, they come to the conclusion that the mean price of SUV is more than $46,435 in his country. Then they randomly select 64 SUVs whose mean price is $46,760. Assuming the standard deviation of the sample is 1370. Ida Lee conducts a hypothesis test to check their conclusion. At which significant level should Ida Lee reject the null hypothesis?

选项：

A.

0.5%.

B.

5%.

C.

1%.

解释：

B is correct.

If the significant level is 5%, the critical value=1.669<1.8978, Ida Lee should reject the null.

If the significant level is 0.5%, the critical value=2.656>1.8978, Ida Lee will fail to reject the null.

If the significant level is 1%, the critical value=2.387>1.8978, Ida Lee will fail to reject the null.


这个t表 考试会给么 会明确表格是单尾还是双尾吗

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1 个答案

品职助教_七七 · 2024年04月10日

嗨，爱思考的PZer你好：


1）会给相关表格或者必要提示；

2）会直接明确表格/提示的单双尾（大概率），或给出足够判断的条件（小概率）；

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