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大家在搜：付费调查观察法概率抽样哥特曼量表滚雪球抽样访谈法分层抽样非概率抽样二项选择法二路焦点小组

分层比例抽样

网络stratified proportional sampling;proportionate stratified sampling;proportional allocation;Size proportionate stratified sampling

分层比例抽样

分层比例抽样

1

方法采取分层随机不等比例抽样法，抽取镇安、木城、腊勐3个乡9个行政村，逐户调查村民疟史情况。

Methods An epidemiological survey was carried out house by house according to stratified random varied proportion sampling , nine villages of three towns were chosen .

热门查询

分享经济分类陈列分期付款分期还款分段相加运价分析性组织分离制分类所得税分税制改革分销物流学分层抽样分提单分布式创新分销渠道信息分销商选择分销商风险分销渠道设计分销渠道层次分布式领导分类表决制度