ASTM E178-2008 外部观察的标准实施规程
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【英文标准名称】:StandardPracticeforDealingWithOutlyingObservations
【原文标准名称】:外部观察的标准实施规程
【标准号】:ASTME178-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E11.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:dixontest;grossdeviation;Grubbstest;outlier;Outliers;Samplingdataanalysis/statistics;Statisticalmethods;Outliers;Samplingdataanalysis/statistics;Statisticalmethods
【摘要】:1.1Thispracticecoversoutlyingobservationsinsamplesandhowtotestthestatisticalsignificanceofthem.Anoutlyingobservation,orx201C;outlier,x201D;isonethatappearstodeviatemarkedlyfromothermembersofthesampleinwhichitoccurs.Inthisconnection,thefollowingtwoalternativesareofinterest:1.1.1Anoutlyingobservationmaybemerelyanextrememanifestationoftherandomvariabilityinherentinthedata.Ifthisistrue,thevalueshouldberetainedandprocessedinthesamemannerastheotherobservationsinthesample.1.1.2Ontheotherhand,anoutlyingobservationmaybetheresultofgrossdeviationfromprescribedexperimentalprocedureoranerrorincalculatingorrecordingthenumericalvalue.Insuchcases,itmaybedesirabletoinstituteaninvestigationtoascertainthereasonfortheaberrantvalue.Theobservationmayevenactuallyberejectedasaresultoftheinvestigation,thoughnotnecessarilyso.Atanyrate,insubsequentdataanalysistheoutlieroroutlierswillberecognizedasprobablybeingfromadifferentpopulationthanthatoftheothersamplevalues.1.2Itisourpurposeheretoprovidestatisticalrulesthatwillleadtheexperimenteralmostunerringlytolookforcausesofoutlierswhentheyreallyexist,andhencetodecidewhetheralternative1.1.1above,isnotthemoreplausiblehypothesistoaccept,ascomparedtoalternative1.1.2,inorderthatthemostappropriateactioninfurtherdataanalysismaybetaken.Theprocedurescoveredhereinapplyprimarilytothesimplestkindofexperimentaldata,thatis,replicatemeasurementsofsomepropertyofagivenmaterial,orobservationsinasupposedlysinglerandomsample.Nevertheless,thetestssuggesteddocoverawideenoughrangeofcasesinpracticetohavebroadutility.
【中国标准分类号】:A41
【国际标准分类号】:03_120_30
【页数】:18P.;A4
【正文语种】:英语
【原文标准名称】:外部观察的标准实施规程
【标准号】:ASTME178-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008
【实施或试行日期】:
【发布单位】:美国材料与试验协会(US-ASTM)
【起草单位】:E11.10
【标准类型】:(Practice)
【标准水平】:()
【中文主题词】:
【英文主题词】:dixontest;grossdeviation;Grubbstest;outlier;Outliers;Samplingdataanalysis/statistics;Statisticalmethods;Outliers;Samplingdataanalysis/statistics;Statisticalmethods
【摘要】:1.1Thispracticecoversoutlyingobservationsinsamplesandhowtotestthestatisticalsignificanceofthem.Anoutlyingobservation,orx201C;outlier,x201D;isonethatappearstodeviatemarkedlyfromothermembersofthesampleinwhichitoccurs.Inthisconnection,thefollowingtwoalternativesareofinterest:1.1.1Anoutlyingobservationmaybemerelyanextrememanifestationoftherandomvariabilityinherentinthedata.Ifthisistrue,thevalueshouldberetainedandprocessedinthesamemannerastheotherobservationsinthesample.1.1.2Ontheotherhand,anoutlyingobservationmaybetheresultofgrossdeviationfromprescribedexperimentalprocedureoranerrorincalculatingorrecordingthenumericalvalue.Insuchcases,itmaybedesirabletoinstituteaninvestigationtoascertainthereasonfortheaberrantvalue.Theobservationmayevenactuallyberejectedasaresultoftheinvestigation,thoughnotnecessarilyso.Atanyrate,insubsequentdataanalysistheoutlieroroutlierswillberecognizedasprobablybeingfromadifferentpopulationthanthatoftheothersamplevalues.1.2Itisourpurposeheretoprovidestatisticalrulesthatwillleadtheexperimenteralmostunerringlytolookforcausesofoutlierswhentheyreallyexist,andhencetodecidewhetheralternative1.1.1above,isnotthemoreplausiblehypothesistoaccept,ascomparedtoalternative1.1.2,inorderthatthemostappropriateactioninfurtherdataanalysismaybetaken.Theprocedurescoveredhereinapplyprimarilytothesimplestkindofexperimentaldata,thatis,replicatemeasurementsofsomepropertyofagivenmaterial,orobservationsinasupposedlysinglerandomsample.Nevertheless,thetestssuggesteddocoverawideenoughrangeofcasesinpracticetohavebroadutility.
【中国标准分类号】:A41
【国际标准分类号】:03_120_30
【页数】:18P.;A4
【正文语种】:英语
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