【英文标准名称】:PracticeforDealingwithOutlyingObservations
【原文标准名称】:海面观察惯例
【标准号】:ANSI/ASTME178-2002
【标准状态】:作废
【国别】:美国
【发布日期】:2002
【实施或试行日期】:
【发布单位】:美国国家标准学会(US-ANSI)
【起草单位】:ANSI
【标准类型】:()
【标准水平】:()
【中文主题词】:阅读;试验
【英文主题词】:Processes;Quality;Reading;Testing
【摘要】:Thispracticecoversoutlyingobservationsinsamplesandhowtotestthestatisticalsignificanceofthem.Anoutlyingobservation,or"outlier,"isonethatappearstodeviatemarkedlyfromothermembersofthesampleinwhichitoccurs.Inthisconnection,thefollowingtwoalternativesareofinterest:Anoutlyingobservationmaybemerelyanextrememanifestationoftherandomvariabilityinherentinthedata.Ifthisistrue,thevalueshouldberetainedandprocessedinthesamemannerastheotherobservationsinthesample.Ontheotherhand,anoutlyingobservationmaybetheresultofgrossdeviationfromprescribedexperimentalprocedureoranerrorincalculatingorrecordingthenumericalvalue.Insuchcases,itmaybedesirabletoinstituteaninvestigationtoascertainthereasonfortheaberrantvalue.Theobservationmayevenactuallyberejectedasaresultoftheinvestigation,thoughnotnecessarilyso.Atanyrate,insubsequentdataanalysistheoutlieroroutlierswillberecognizedasprobablybeingfromadifferentpopulationthanthatoftheothersamplevalues.Itisourpurposeheretoprovidestatisticalrulesthatwillleadtheexperimenteralmostunerringlytolookforcausesofoutlierswhentheyreallyexist,andhencetodecidewhetheralternativeabove,isnotthemoreplausiblehypothesistoaccept,ascomparedtoalternative,inorderthatthemostappropriateactioninfurtherdataanalysismaybetaken.Theprocedurescoveredhereinapplyprimarilytothesimplestkindofexperimentaldata,thatis,replicatemeasurementsofsomepropertyofagivenmaterial,orobservationsinasupposedlysinglerandomsample.Nevertheless,thetestssuggesteddocoverawideenoughrangeofcasesinpracticetohavebroadutility.
【中国标准分类号】:A42
【国际标准分类号】:03_120_30
【页数】:
【正文语种】:英语