亚洲AV成人精品一区二区三区四区|快播日韩美嘛豆一区|国产欧美激情a级免费|一级黄片AAA色一品|久久国产成人精品Av|谁有AV免费观看|成人高清国产视频|日韩区欧美区久久综合一区|在线观看黄色网页|亚洲欧美国产11

單詞乎

stratified sampling

stratified sampling是什么意思、stratified sampling怎么讀

stratified sampling漢語翻譯

【計】 成層抽樣
【經(jīng)】 分層抽樣

stratified sampling英語解釋

名詞 stratified sampling:

  1. the population is divided into subpopulations (strata) and random samples are taken of each stratum
    同義詞：representative sampling, proportional sampling
0
糾錯