名词
中文翻译：主要子集
同义词：
['major subset', 'primary group', 'primary class例句：1. In statistics', 'a primary subset is a set of observations that are used to estimate the mean and variance of a larger population.（在统计学中，一个主要子集是一组观测值，用于估计大群体的均值和方差。）']
例句：
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1. In statistics, a primary subset is a set of observations that are used to estimate the mean and variance of a larger population.
在统计学中，一个主要子集是一组观测值，用于估计大群体的均值和方差。
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2. The primary subset of the dataset contains only the variables that are relevant to the research question.
数据集的主要子集只包含与研究问题相关的变量。
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3. The researchers identified several key factors that contributed to the success of their project, including the primary subset of participantswho were most engaged with the program.
研究人员识别出几个关键因素对项目成功做出了贡献，其中包括参与项目最积极的参与者的主要子集。