Proportions, simple random sample...................................................................... SMPPR
Proportions, stratified random sample................................................................... SMPPS
Ratio or regression estimates, simple random sample............................................ SMPRR
Ratio or regression estimates, stratified random sample......................................... SMPRS
Single-stage cluster sample................................................................................. SMPSC
Simple random sample........................................................................................ SMPSR
Stratified random sample..................................................................................... SMPSS
Two-stage sample with equisized primary units...................................................... SMPST
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