proportional sampling

英 美
  • 比例采样,比例抽样,按比例抽样
  • proportional adj.成比例的;相称的n.[数]比例项
  • sampling n.抽样;样品动词sample的现在分词形式.
Noun:
  1. the population is divided into subpopulations (strata) and random samples are taken of each stratum