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【英文标准名称】:Statisticalinterpretationofdata-Testsfordeparturefromthenormaldistribution
【原文标准名称】:数据的统计解释偏离正态分布的检验
【标准号】:ISO5479-1997
【标准状态】:现行
【国别】:国际
【发布日期】:1997-05
【实施或试行日期】:
【发布单位】:国际标准化组织(IX-ISO)
【起草单位】:ISO/TC69
【标准类型】:()
【标准水平】:()
【中文主题词】:定义;统计质量控制;统计学;统计分布;估计;数据;解释;数据处理;质量控制;统计方法分析
【英文主题词】:Data;Dataprocessing;Definitions;Estimation;Graphicrepresentation;Graphicalmethods;Instructions;Interpretations;Measuredvalue;Methods;Multilingual;Probabilitynetwork;Qualitycontrol;Statisticaldistribution;Statisticalmethodsofanalysis;Statisticalqualitycontrol;Statistics;Symbols
【摘要】:1ThisInternationalStandardgivesguidanceonmethodsandtestsforuseindecidingwhetherornotthehypothesisofanormaldistributionshouldberejected,assumingthattheobservationsareindependent.2Whenevertherearedoubtsastowhethertheobservationsarenormallydistributed,theuseofatestfordeparturefromthenormaldistributionmaybeusefulorevennecessary.Inthecaseofrobustmethods,however(i.e.wheretheresultsareonlyalteredveryslightlywhentherealprobabilitydistributionoftheobservationsisnotanormaldistribution),atestfordeparturefromthenormaldistributionisnotveryhelpful.Thisisthecase,forexample,whenthemeanofasinglerandomsampleofobservationsistobecheckedagainstagiventheoreticalvalueusingat-test.3Itisnotstrictlynecessarytousesuchatestwheneveronereferstostatisticalmethodsbasedonthehypothesisofnormality.Itispossiblethatthereisnodoubtatallastothenormaldistributionoftheobservations,whethertheoretical(e.g.physical)reasonsarepresentwhichconfirmthehypothesisorbecausethishypothesisisdeemedtobeacceptableaccordingtopriorinformation.4ThetestsfordeparturefromthenormaldistributionselectedinthisInternationalStandardareprimarilyintendedforcompletedata,notgroupeddata.Theyareunsuitableforcensoreddata.5ThetestsfordeparturefromthenormaldistributionselectedinthisInternationalStandardmaybeappliedeithertoobservedvaluesortofunctionsofthem,suchasthelogarithmorthesquareroot.6Testsfordeparturefromthenormaldistributionareveryineffectiveforsamplesofsizelessthaneight.Accordingly,thisInternationalStandardisrestrictedtosamplesofeightormore.
【中国标准分类号】:A41
【国际标准分类号】:03_120_30
【页数】:33P;A4
【正文语种】:英语


【英文标准名称】:OUTLINEOFINVESTIGATIONFOROPTICALFIBERANDCOMMUNICATIONCABLEROUTINGASSEMBLIESIssueNumber:2
【原文标准名称】:光缆和通信电缆布线组件调查大纲.发布编号:2
【标准号】:ULSUBJECT2024A-2008
【标准状态】:现行
【国别】:美国
【发布日期】:2008-05-22
【实施或试行日期】:
【发布单位】:美国保险商实验所(US-UL)
【起草单位】:
【标准类型】:()
【标准水平】:()
【中文主题词】:
【英文主题词】:
【摘要】:1.1Theserequirementscoverthefollowingtypesofroutingassembliesdesignedforuseintelecommunicationinstallationswithopticalfiberandcommunicationscables:a)Plenum–Evaluatedforinstallationinducts,plenums,orotherspacesusedforenvironmentalairaswellasgeneralpurposeapplications.b)Riser–Evaluatedforinstallationinrisersaswellasgeneralpurposeapplications.c)GeneralUse–Evaluatedforgeneralpurposeapplicationsonly.1.2Thisoutlinecoversroutingassembliesforinstallationofnonconductiveopticalfibercableandcommunicationscable.Theroutingassembliesareonlysuitablefortheinstallationofopticalfiberandcommunicationscablenotedinthefollowinginformation.Individualroutingassemblysystemsdifferintheirconstruction;therefore,theircomponentsarenotinterchangeablewithroutingassembliesorfittingsofothersystems.Thisproductcategoryincludespliablelengths,rigidstraightsections,elbows,bendsandfittingssuchasexpansionjoints,femaleandmaleadapters,andcouplings.1.3Theseproductsareintendedforinstallationintelecommunicationsfacilities.Theseproductsmayormaynotincorporateendfixturesorcovers.1.4Aroutingassemblymarked"Plenum"issuitableforuseinducts,plenumsorotherspacesusedforenvironmentalairinaccordancewithSections770.154(A)and800.154(A)oftheNationalElectricalCode(NEC),NFPA70,whenusedtoencloseopticalfibercablesmarkedOFCPorOFNPorcommunicationscablemarkedCMPorCMP-OF.Thisroutingassemblyexhibitsamaximumpeakopticaldensityof0.5,amaximumaverageopticaldensityof0.15,andamaximumflamespreaddistanceof5feet(152cm)whentestedinaccordancewiththeTestforFlamePropagationandSmoke-DensityValues(Plenum)intheStandardforOpticalFiberandCommunicationCableRaceway,UL2024.Thisroutingassemblyisidentifiedbyamarkingonitssurfaceoronamarkertapeindicating"Plenum."1.5Aroutingassemblymarked2Plenum2isalsosuitableforinstallationinriserswhenusedtoenclose:a)OpticalfibercablemarkedOFNPorOFNR;b)CommunicationscablemarkedCMP,CMP-OF,CMRorCMR-OF.ThisroutingassemblyisalsosuitableforgeneralpurposeusewhenusedtoencloseopticalfibercablemarkedOFCP,OFCR,OFNP,OFNR,OFNG,orOFNorcommunicationscablemarkedCMP,CMP-OF,CMR,CMR-OF,CMG,CMG-OF,CM,orCM-OF.1.6Aroutingassemblymarked2Riser2issuitableforinstallationinriserinstallationswhenusedtoencloseopticalfibercablemarkedOFCP,OFCR,OFNPandOFNRorcommunicationscablemarkedCMP,CMP-OF,CMRorCMR-OF.ThisroutingassemblyhasfireresistantcharacteristicsthatareintendedtopreventthecarryingoffirefromfloortofloorandmeetsthetestrequirementsoftheTestforFlamePropagation(Riser)intheStandardforOpticalFiberandCommunicationCableRaceway,UL2024.Thisroutingassemblyisidentifiedbyamarkingonitssurfaceoronamarkertapeindicating"Riser."1.7Aroutingassemblymarked"Riser"isalsosuitableforgeneralpurposeusewhenusedtoencloseopticalfibercablemarkedOFNP,OFNR,OFNG,OFC,orOFNorcommunicationscablemarkedCMP,CMP-OF,CMR,CMR-OF,CMG,CMG-OF,CM,andCM-OF.1.8Aroutingassemblythatisnotmarkedeither"Plenum"nor"Riser"issuitableforgeneralpurposeuseexceptforrisers,plenums,andotherspacesusedforenvironmentalairwhenusedtoencloseopticalfibercablemarkedOFCG,OFCP,OFCR,OFNG,OFNP,OFNR,orOFNorcommunicationscablemarkedCMG,CMG-OF,CM,CM-OF,CMR,CMR-OF,CMP,orCMP-OF.ThistypeofroutingassemblyisresistanttothespreadoffirewhentestedinaccordancewiththeVertical-TrayFlameTest(GeneralUse)intheStandardforOpticalFiberandCommunicationCableRaceway,UL2024.
【中国标准分类号】:M33
【国际标准分类号】:
【页数】:14P.;A4
【正文语种】:英语