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Susie · 2023年04月13日

这题不太理解

NO.PZ2022071202000098

问题如下:

Question Given a large random sample, which of the following types of data are least appropriately analyzed with nonparametric tests?

选项:

A.Signed data (e.g., number of positives and negatives) B.Ranked data (e.g., 1st, 3rd) C.Numerical values (e.g., 28.43, 79.11)

解释:

Solution

C is correct. Nonparametric tests are primarily concerned with ranks, signs, or groups, and they are used when numerical parameters are not known or do not meet assumptions about distributions. Even if the underlying distribution is unknown, parametric tests can be used on numerical data if the sample is large.

A is incorrect because nonparametric tests can be used on grouped or counted data.

B is incorrect because nonparametric tests can be used on ranked data.



1 个答案

星星_品职助教 · 2023年04月13日

同学你好,

这道题目考察何时不使用nonparametric test。换个角度出发,能用parametric test解决的问题,就不需要使用比较复杂的nonparametric test。

C选项是普通的数值,这种情况直接用parametric test就可以,例如学过的检验均值/方差是否等于一个固定的数字。即选择C选项。

而当检验的不是数字,而是分类数据或者排序数据时,parametric test就无法使用了,此时只能使用nonparametric test。即不选择A、B选项。


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