BS ISO 13909-8-2002 硬煤和焦炭.机械取样.偏差试验方法

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【英文标准名称】:Hardcoalandcoke-Mechanicalsampling-Methodsoftestingforbias
【原文标准名称】:硬煤和焦炭.机械取样.偏差试验方法
【标准号】:BSISO13909-8-2002
【标准状态】:现行
【国别】:英国
【发布日期】:2002-01-23
【实施或试行日期】:2002-01-23
【发布单位】:英国标准学会(BSI)
【起草单位】:BSI
【标准类型】:()
【标准水平】:()
【中文主题词】:抽样方法;固体燃料;贸易标准;矿物燃料;偏差;测量特征;焦炭;煤
【英文主题词】:Bias;Bituminouscoal;Coal;Coke;Defects;Errordetection;Fossilfuels;Fuels;Hardcoal;Sampling;Samplingmethods;Solidfuels;Specification(approval);Specimenpreparation;Specimens;Testspecimens;Testing;Variations
【摘要】:ThispartofISO13909setsoutprinciplesandproceduresfortestingthebiasoftestsamplesofhardcoalsorcokes,takeninaccordancewithotherpartsofISO13909.Theuseofunivariatestatisticalmethodsonlyisaddressed.Theuseriscautionedthatthechanceoffalselyconcludingthatthereisabias,whennobiasexistsinanyoneofseveralvariablesmeasuredonthesamesetofsamples,issubstantiallygreaterthanforasinglevariable.Whileseveralvariablesmaybemeasured,thesinglevariableonwhichtheoutcomeofthetestwillbegovernedshallbedesignatedinadvance.NOTEInthetexttheterm'fuel'isusedwherebothcoalandcokewouldbeapplicableinthecontextandeither'coal'or'coke'whereonlyoneisapplicable.
【中国标准分类号】:D20
【国际标准分类号】:73_040;75_160_10
【页数】:40P;A4
【正文语种】:英语