stratified sampling成層抽樣分層抽樣學術名詞分層抽樣:數學、化學術語、心理學、統計學、電機工程、化學分層取樣:生態學、化學術語、化學、食品科技分層選樣法:會計學分層採樣:食品科技分層抽樣法:行政學英文釋義the population is divided into subpopulations (strata) and random samples are taken of each stratum