primal cluster 中文意思是什麼
primal cluster
解釋
一次簇-
Methods used stratified sampling and cluster sampling, sampled 400 teacher of middle and primal school from lin hai. the questionnaires was same, surveyors have trained strict
浙江大學碩士學位論文方8 :採用分層抽樣與整群抽樣相結合的方法,抽取臨海市中個學教師400名進行現場問卷調查。
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