snowball sampling

基本解释

A snowball sampling non-probability sample was used.
样本的取样方式采取非机率型之滚雪球抽样法。
Methods Convenience sampling and snowball sampling were used to select respondents; questionnaire was used during the research.
方法采用滚雪球抽样法和方便抽样法选取对象，用自行设计的《同志健康需求评估》问卷开展调查。
Questionnaire survey was used in this research, and researchers selected college students from more than 20 universities of China as research participants through snowball sampling on Internet.
方法：问卷调查法，透过网络采取滚雪球方式抽取二十多所高校的在校大学生为研究对象。