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凡尘白骑士 · 2019年12月15日

问一道题:NO.PZ2015120604000155

问题如下:

An analyst wants to test whether the means of two populations are equal. Which of the following statement is most appropriate?

选项:

A.

Assumptions: normally distributed and independent populations, variance are equal.

How to test:    F-test.

B.

Assumptions: normally distributed and independent populations, variance are not equal.

How to test:    F-test.

C.

Assumptions: normally distributed populations, samples are not independent.

How to test:    paired comparisions test.

解释:

C is correct.

If the two populations are normally distributed and independent, no matter the variance assumed equal or not, it will be most appropriate to use the T-test or Z-test.

这道题目还是没懂,我看前面有老师回答A答案是对的,b,c错误。

1 个答案

星星_品职助教 · 2019年12月16日

同学你好,

这道题就是一个结论,根据上课时总结的表格记忆即可,不是特别重要。

此外这道题改过,按照正确答案为C来处理即可,加油~