Little has been said about purpose sampling which is used much more in practice.
对使用较多的有目的抽样则阐述较少。
Method Purpose sampling combined with quota sampling were adopted, and the data of nursing quality assessment standards of 17 hospitals in China were obtained and analyzed.
结果各医院评价标准所涉及的评价指标不尽相同，同一指标的评价标准条目设立、权重设定差异均较大，且尚无统一的计分方法。
Purpose To solve the problem of sampling within household in resident health survey and generate a representative sample.
目的解决居民健康调查中入户后的抽样问题，产生代表性较好的研究样本。
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