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stratified sampling
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【计】 成层抽样\n【经】 分层抽样
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详细解释：
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以下为句子列表：
英文: Methods Centers of disease prevention and control in three parts of China had been sampled by two-stage stratified sampling method to investigate the fulfillment degree of quality and quantity of the treatment management of Hypertension Patients in commun
中文: 方法运用分层抽样、问卷调查的方法，获得社区高血压患者治疗规范管理的数量完成程度和质量达标程度及相应难点。
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英文: This article tries to model the goal programming by the study of stratified sampling about a single-collectivity and a multi-collectivity on the condition that the total amount of investigation expresses and the requirement of accuracy in the investigatio
中文: 摘要在给定调查总费用及调查精度要求的情况下，分别建立了单个总体及多个总体的分层抽样调查的目标规划模型。
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