... 3、集群取样(Cluster sampling) 4、多水平取样(Multi-level sampling) 5、分层取样(Stratify sampling) ...
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multi level sampling 多阶抽样
multi level sampling interpretation approach 多阶抽样解译法
multi-level continuous sampling plans 多水准连续抽样计画
tightened multi-level continuous sampling plan 加严多水平连续抽样方案
sampling plan multi-level 多层次抽样计划
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