Valsts valodas centra izstrādātie sociālo jautājumu, socioloģijas un statistikas termini

Konteksts: [..] These ones apply to sampling designs where a direct sampling of households is impossible or impractical. In this case, a multistage sampling is required: the population elements are first grouped into disjoint subpopulations, called primary sampling units (PSUs) [..]
Avots: European Commission, Description of Target Variables: Cross-sectional and Longitudinal