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狂狷 · 2022年03月04日

选择c是什么意思

NO.PZ2021061603000008

问题如下:

In a frequency distribution, the absolute frequency measure

选项:

A. represents the percentages of each unique value of the variable

B. represents the actual number of observations counted for each unique value of the variable

C. allows for comparisons between datasets with different numbers of total observations

解释:

B is correct. In a frequency distribution, the absolute frequency, or simply the raw frequency, is the actual number of observations counted for each unique value of the variable. A is incorrect because the relative frequency, which is calculated as the absolute frequency of each unique value of the variable divided by the total number of observations, presents the absolute frequencies in terms of percentages. C is incorrect because the relative (not absolute) frequency provides a normalized measure of the distribution of the data, allowing comparisons between datasets with different numbers of total observations.

请问c讲的是什么意思

1 个答案

星星_品职助教 · 2022年03月05日

同学你好,

C选项指的是absolute frequency可以用于两个数据集之间的比较,并且这两个数据集里包含的观察值(total observations)还是不相同的。

总数不同的情况下,absolute frequency是不能直接比较的,可以比较的是relative frequency。