题目
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 valueof the variable.
C.allows for comparisons between datasets with different numbers of total observations.
答案
B
解析
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 term 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. B是正确的。在频率分布中，绝对频数，指的是落在每一个区间中的观测值的个数。 A是不正确的，相对频率，指的是落在某一个区间中数据的占比，通常用百分比的形式表示。 C是不正确的，相对频率提供了数据分布的标准化度量，允许对具有不同总观察数的数据集之间进行比较。