| 单词 | stratified sample |
| 释义 | stratified samplenounstatistics a sample that is not drawn at random from the whole population, but separately from a number of disjoint strata of the population in order to ensure a more representative sampleSee also frame (def. 13) Words nearby stratified samplestratificational grammar, stratified, stratified charge engine, stratified epithelium, stratified random sample, stratified sample, stratiform, stratiformis, stratify, stratig., stratigraphy Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012 |
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