Designation:D5791−95(Reapproved2012)´1StandardGuideforUsingProbabilitySamplingMethodsinStudiesofIndoorAirQualityinBuildings1ThisstandardisissuedunderthefixeddesignationD5791;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ε1NOTE—ReapprovedwitheditorialchangesinApril2012.1.Scope1.1Thisguidecoverscriteriafordeterminingwhenprob-abilitysamplingmethodsshouldbeusedtoselectlocationsforplacementofenvironmentalmonitoringequipmentinabuild-ingortoselectasampleofbuildingoccupantsforquestion-naireadministrationforastudyofindoorairquality.Someofthebasicprobabilitysamplingmethodsthatareapplicableforthesetypesofstudiesareintroduced.1.2Probabilitysamplingreferstostatisticalsamplingmeth-odsthatselectunitsforobservationwithknownprobabilities(includingprobabilitiesequaltooneforacensus)sothatstatisticallydefensibleinferencesaresupportedfromthesampletotheentirepopulationofunitsthathadapositiveprobabilityofbeingselectedintothesample.1.3Thisguidedescribesthosesituationsinwhichprobabil-itysamplingmethodsareneededforascientificstudyoftheindoorairqualityinabuilding.Forthosesituationsforwhichprobabilitysamplingmethodsarerecommended,guidanceisprovidedonhowtoimplementprobabilitysamplingmethods,includingobstaclesthatmayarise.Examplesoftheirapplica-tionareprovidedforselectedsituations.Becausesomeindoorairqualityinvestigationsmayrequireapplicationofcomplex,multistage,surveysamplingproceduresandbecausethisstan-dardisaguideratherthanapractice,thereferencesinAppendixX1arerecommendedforguidanceonappropriateprobabilitysamplingmethods,ratherthanincludingexposi-tionsofsuchmethodsinthisguide.1.4Units—ThevaluesstatedinSIunitsaretoberegardedasstandard.Nootherunitsofmeasurementareincludedinthisstandard.2.ReferencedDocuments2.1ASTMStandards:2D1356TerminologyRelatingtoSamplingandAnalysisofAtmospher...
