<synset id="n00162417" type="n">
<lex_filenum>04<lex_filenum/>
<word lex_id="0">stratified sampling<word/>
<word lex_id="0">representative sampling<word/>
<word lex_id="0">proportional sampling<word/>
<pointer refs="n00161888">Hypernym<pointer/>
<def>the population is divided into subpopulations (strata) and random samples are taken of each stratum<def/>
<synset/>