ASTM_D_6300_-_15.pdf

Designation:D630015An American National StandardStandard Practice forDetermination of Precision and Bias Data for Use in TestMethods for Petroleum Products and Lubricants1This standard is issued under the fixed designation D6300;the number immediately following the designation indicates the year oforiginal adoption or,in the case of revision,the year of last revision.A number in parentheses indicates the year of last reapproval.Asuperscript epsilon()indicates an editorial change since the last revision or reapproval.INTRODUCTIONBoth Research Report RR:D02-1007,2Manual on Determining Precision Data for ASTM Methodson Petroleum Products and Lubricants2and the ISO 4259,benefitted greatly from more than 50 yearsof collaboration between ASTM and the Institute of Petroleum(IP)in the UK.The more recent workwas documented by the IP and has become ISO 4259.ISO 4259 encompasses both the determination of precision and the application of such precisiondata.In effect,it combines the type of information in RR:D02-10072regarding the determination ofthe precision estimates and the type of information in Practice D3244 for the utilization of test data.The following practice,intended to replace RR:D02-1007,2differs slightly from related portions of theISO standard.1.Scope*1.1 This practice covers the necessary preparations andplanning for the conduct of interlaboratory programs for thedevelopment of estimates of precision(determinability,repeatability,and reproducibility)and of bias(absolute andrelative),and further presents the standard phraseology forincorporating such information into standard test methods.1.2 This practice is generally limited to homogeneous prod-ucts with which serious sampling problems do not normallyarise.1.3 This practice may not be suitable for solid or semisolidproducts such as petroleum coke,industrial pitches,paraffinwaxes,greases,or solid lubricants when the heterogeneousproperties of the substances create sampling problems.In suchinstances,use Practice E691 or consult a trained statistician.2.Referenced Documents2.1 ASTM Standards:3D3244 Practice for Utilization of Test Data to DetermineConformance with SpecificationsD3606 Test Method for Determination of Benzene andToluene in Finished Motor and Aviation Gasoline by GasChromatographyD6708 Practice for Statistical Assessment and Improvementof Expected Agreement Between Two Test Methods thatPurport to Measure the Same Property of a MaterialD7915 Practice for Application of Generalized ExtremeStudentized Deviate(GESD)Technique to Simultane-ously Identify Multiple Outliers in a Data SetE29 Practice for Using Significant Digits in Test Data toDetermine Conformance with SpecificationsE177 Practice for Use of the Terms Precision and Bias inASTM Test MethodsE456 Terminology Relating to Quality and StatisticsE691 Practice for Conducting an Interlaboratory Study toDetermine the Precision of a Test Method2.2 ISO Standards:ISO 4259 Petroleum Products-Determination and Applica-tion of Precision Data in Relation to Methods of Test43.Terminology3.1 Definitions:3.1.1 analysis of variance(ANOVA),ntechnique that en-ables the total variance of a method to be broken down into itscomponent factors.ISO 42591This practice is under the jurisdiction of ASTM Committee D02 on PetroleumProducts,Liquid Fuels,and Lubricantsand is the direct responsibility of Subcom-mittee D02.94 on Coordinating Subcommittee on Quality Assurance and Statistics.Current edition approved June 1,2015.Published June 2015.Originallyapproved in 1998.Last previous edition approved in 2014 as D6300 14a1.DOI:10.1520/D6300-15.2Supporting data have been filed at ASTM International Headquarters and maybe obtained by requesting Research Report RR:D02-1007.3For referenced ASTM standards,visit the ASTM website,www.astm.org,orcontact ASTM Customer Service at serviceastm.org.For Annual Book of ASTMStandards volume information,refer to the standards Document Summary page onthe ASTM website.4Available from American National Standards Institute(ANSI),25 W.43rd St.,4th Floor,New York,NY 10036,http:/www.ansi.org.*A Summary of Changes section appears at the end of this standardCopyright ASTM International,100 Barr Harbor Drive,PO Box C700,West Conshohocken,PA 19428-2959.United States1 3.1.2 bias,nthe difference between the expectation of thetest results and an accepted reference value.3.1.2.1 DiscussionThe term“expectation”is used in thecontext of statistics terminology,which implies it is a“statis-tical expectation.”E1773.1.3 between-method bias(relative bias),na quantitativeexpression for the mathematical correction that can statisticallyimprove the degree of agreement between the expected valuesof two test methods which purport to measure the sameproperty.D67083.1.4 degrees of freedom,nthe divisor used in the calcu-lation of variance,one less than the number of independentresults.3.1.4.1 DiscussionThis definition applies strictly only inthe simplest cases.Complete definitions are beyond the scopeof this practice