Designation:G117−13StandardGuideforCalculatingandReportingMeasuresofPrecisionUsingDatafromInterlaboratoryWearorErosionTests1ThisstandardisissuedunderthefixeddesignationG117;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.1.Scope1.1Thisguidecoversandoffersdirectiononthehandlingofdatafrominterlaboratorytestsforwearorerosion.ItdescribesaformatforenteringdataandforsubsequentlyreportingresultsonmeasuresofprecisioninaCommitteeG02standard.Itindicatesmethodsforcalculationoftheneededstatisticalquantities.1.2ThisguideoffersguidancebasedonaCommitteeG02consensus,andexistsforthepurposeofemphasizingtheneedtouseestablishedstatisticalpractices,andtointroducemoreuniformityinreportinginterlaboratorytestresultsinCommit-teeG02standards.1.3Anexampleofhowthemethodsdescribedinthisguidemaybeappliedisavailableinpersonalcomputerformatasaspreadsheetfile.Thepurposeistofacilitateuseofthemethodsinthisguide.Theexamplefilecontainsallneededequationsintherecommendedformatandcanbeeditedtoacceptnewdata.ContactASTMHeadquartersortheChairmanofG02foracopyofthatcomputerfile.Theusermusthavespreadsheetsoftware(EXCELorcompatible)available.1.4ThemethodsusedinthisdocumentareconsistentwithPracticesE691andE177.2.ReferencedDocuments2.1ASTMStandards:2E177PracticeforUseoftheTermsPrecisionandBiasinASTMTestMethodsE691PracticeforConductinganInterlaboratoryStudytoDeterminethePrecisionofaTestMethodG65TestMethodforMeasuringAbrasionUsingtheDrySand/RubberWheelApparatusG76TestMethodforConductingErosionTestsbySolidParticleImpingementUsingGasJetsG77TestMethodforRankingResistanceofMaterialstoSlidingWearUsingBlock-on-RingWearTest3.SummaryofGuide3.1UseofthisguideinpreparationofinterlaboratorytestresultsforinclusioninG02standardsinvolvesasequenceofsteps.Firsttherawdatafromtheindividuallaboratoriesareenteredintoatableofany...
