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  • ISO 13528:2015

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    Statistical methods for use in proficiency testing by interlaboratory comparison

    Available format(s):  Hardcopy, PDF, PDF 3 Users, PDF 5 Users, PDF 9 Users

    Language(s):  English, French

    Published date:  28-07-2015

    Publisher:  International Organization for Standardization

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    Abstract - (Show below) - (Hide below)

    ISO 13528:2015 provides detailed descriptions of statistical methods for proficiency testing providers to use to design proficiency testing schemes and to analyse the data obtained from those schemes. It provides recommendations on the interpretation of proficiency testing data by participants in such schemes and by accreditation bodies.

    The procedures in ISO 13528:2015 can be applied to demonstrate that the measurement results obtained by laboratories, inspection bodies, and individuals meet specified criteria for acceptable performance.

    ISO 13528:2015 is applicable to proficiency testing where the results reported are either quantitative measurements or qualitative observations on test items.

    General Product Information - (Show below) - (Hide below)

    Committee ISO/TC 69/SC 6
    Development Note Supersedes ISO/DIS 13528. (07/2015)
    Document Type Standard
    Product Note THIS STANDARD HAVE CORRECT VERSION FOR EN AND FR - 2016 Corrected version now available for this standard for language (EN)-2016
    Publisher International Organization for Standardization
    Status Current
    Supersedes

    Standards Referenced By This Book - (Show below) - (Hide below)

    DIN EN ISO 16198:2015-04 SOIL QUALITY - PLANT-BASED TEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS (ISO 16198:2015)
    06/30141610 DC : DRAFT AUG 2006 ISO 20612 - WATER QUALITY - INTERLABORATORY COMPARISONS FOR PROFICIENCY TESTING OF ANALYTICAL TESTING LABORATORIES
    S.R. CEN ISO TS 22117:2010 MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - SPECIFIC REQUIREMENTS AND GUIDANCE FOR PROFICIENCY TESTING BY INTERLABORATORY COMPARISON
    BS PD ISO/TR 945-2 : 2011 MICROSTRUCTURE OF CAST IRONS - PART 2: GRAPHITE CLASSIFICATION BY IMAGE ANALYSIS
    10/30174936 DC : 0 BS ISO 11352 - WATER QUALITY - DETERMINATION OF MEASUREMENT UNCERTAINTY BASED ON VALIDATION DATA
    DIN EN ISO 1833-22 E : 2013 TEXTILES - QUANTITATIVE CHEMICAL ANALYSIS - PART 22: MIXTURES OF VISCOSE OR CERTAIN TYPES OF CUPRO OR MODAL OR LYOCELL AND FLAX FIBRES (METHOD USING FORMIC ACID AND ZINC CHLORIDE) (ISO 1833-22:2013)
    08/19974897 DC : DRAFT JULY 2008 BS ISO 16269-4 - STATISTICAL INTERPRETATION OF DATA - PART 4: DETECTION AND TREATMENT OF OUTLIERS
    I.S. EN ISO/IEC 17043:2010 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    DIN EN ISO 1833-22:2013-07 Textiles - Quantitative chemical analysis - Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax fibres (method using formic acid and zinc chloride) (ISO 1833-22:2013)
    12/30271500 DC : 0 BS ISO GUIDE 80 - GUIDANCE FOR IN-HOUSE PRODUCTION OF REFERENCE MATERIALS FOR QUALITY CONTROL (QCMS)
    10/30217333 DC : 0 BS EN 16101 - WATER QUALITY - GUIDANCE STANDARD ON THE DESIGN AND ANALYSIS OF INTERLABORATORY COMPARISON STUDIES FOR ECOLOGICAL ASSESSMENT
    ISO 11352:2012 Water quality Estimation of measurement uncertainty based on validation and quality control data
    SAE J 3010 : 2015 REGISTRATION AND CONFORMITY ASSESSMENT PROCESS FOR PASSENGER CARS AND LIGHT TRUCKS WHEELS
    BS EN ISO 16198 : 2015 SOIL QUALITY - PLANT-BASED TEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS
    UNE-EN ISO 18254-1:2016 Textiles - Method for the detection and determination of alkylphenol ethoxylates (APEO) - Part 1: Method using HPLC - MS (ISO 18254-1:2016)
    DIN EN ISO/IEC 17043 E : 2010 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    BS EN ISO/IEC 17043 : 2010 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    17/30341492 DC : 0 BS ISO 20391-1 - BIOTECHNOLOGY - CELL COUNTING - PART 1: GENERAL GUIDANCE ON CELL COUNTING METHODS
    UNE-EN ISO 1833-22:2013 Textiles - Quantitative chemical analysis - Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax fibres (method using formic acid and zinc chloride) (ISO 1833-22:2013)
    DIN EN 16101:2012-12 WATER QUALITY - GUIDANCE STANDARD ON INTERLABORATORY COMPARISON STUDIES FOR ECOLOGICAL ASSESSMENT
    DIN EN ISO 16198 E : 2015 SOIL QUALITY - PLANT-BASED TEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS (ISO 16198:2015)
    I.S. EN 16101:2012 WATER QUALITY - GUIDANCE STANDARD ON INTERLABORATORY COMPARISON STUDIES FOR ECOLOGICAL ASSESSMENT
    ISO/TR 945-2:2011 Microstructure of cast irons Part 2: Graphite classification by image analysis
    BS EN ISO 18254-1:2016 Textiles. Method for the detection and determination of alkylphenol ethoxylates (APEO) Method using HPLC - MS
    13/30234129 DC : 0 BS EN ISO 16198 - SOIL QUALITY - PLANT-BASED BIOTEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS
    PD CLC/TR 50619:2014 (published 2014-06) Guidance on how to conduct Round Robin Tests
    15/30327269 DC : 0 BS EN ISO 17034 - GENERAL REQUIREMENTS FOR THE COMPETENCE OF REFERENCE MATERIAL PRODUCERS
    BS PD ISO/TR 13519 : 2012 GUIDANCE ON THE DEVELOPMENT AND USE OF ISO STATISTICAL PUBLICATIONS SUPPORTED BY SOFTWARE
    BS EN ISO 1833-22:2013 TEXTILES - QUANTITATIVE CHEMICAL ANALYSIS - PART 22: MIXTURES OF VISCOSE OR CERTAIN TYPES OF CUPRO OR MODAL OR LYOCELL AND FLAX FIBRES (METHOD USING FORMIC ACID AND ZINC CHLORIDE) (ISO 1833-22:2013)
    BS PD CEN/TS 16800 : 2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    DIN EN ISO 18254-1:2016-09 TEXTILES - METHOD FOR THE DETECTION AND DETERMINATION OF ALKYLPHENOL ETHOXYLATES (APEO) - PART 1: METHOD USING HPLC-MS (ISO 18254-1:2016)
    ISO 20391-1:2018 Biotechnology Cell counting Part 1: General guidance on cell counting methods
    S.R. CLC/TR 50619:2014 GUIDANCE ON HOW TO CONDUCT ROUND ROBIN TESTS
    OIML V 2-200 : 2012 INTERNATIONAL VOCABULARY OF METROLOGY - BASIC AND GENERAL CONCEPTS AND ASSOCIATED TERMS (VIM)
    ISO 20418-1:2018 Textiles Qualitative and quantitative proteomic analysis of some animal hair fibres Part 1: Peptide detection using LC-ESI-MS with protein reduction
    VDI 4221 Blatt 1:2015-07 Quality assurance - Requirements on interlaboratory tests in immission control - Requirements on providers of interlaboratory tests
    BS PD CEN/TR 16420 : 2012 ANALYTICAL METHOD FOR THE ANALYSIS OF PROPICONAZOLE IN TREATED WOOD SAMPLES
    VDI 4221-2 : 2017 QUALITY ASSURANCE - REQUIREMENTS ON INTERLABORATORY TESTS IN IMMISSION CONTROL - DESIGN, PERFORMANCE AND EVALUATION OF INTERLABORATORY TESTS FOR EMISSION MEASUREMENT METHODS UNDER LABORATORY CONDITIONS
    EN ISO 20536 : 2017 FOOTWEAR - CRITICAL SUBSTANCES POTENTIALLY PRESENT IN FOOTWEAR AND FOOTWEAR COMPONENTS - DETERMINATION OF PHENOL IN FOOTWEAR MATERIALS (ISO 20536:2017)
    PD ISO/TR 18336:2016 Guidelines for good XRF laboratory practice for the iron ore industry
    BS PD ISO GUIDE 35 : 2017 REFERENCE MATERIALS - GUIDANCE FOR CHARACTERIZATION AND ASSESSMENT OF HOMOGENEITY AND STABILITY
    I.S. EN ISO 1833-22:2013 TEXTILES - QUANTITATIVE CHEMICAL ANALYSIS - PART 22: MIXTURES OF VISCOSE OR CERTAIN TYPES OF CUPRO OR MODAL OR LYOCELL AND FLAX FIBRES (METHOD USING FORMIC ACID AND ZINC CHLORIDE) (ISO 1833-22:2013)
    UNE-ISO/IEC GUIA 99:2012 IN International vocabulary of metrology. Basics and general concepts and associated terms (VIM)
    DIN ISO 11352:2013-03 WATER QUALITY - ESTIMATION OF MEASUREMENT UNCERTAINTY BASED ON VALIDATION AND QUALITY CONTROL DATA (ISO 11352:2012)
    DIN EN ISO 18103:2015-06 SUPERFINE WOVEN WOOL FABRIC LABELLING - REQUIREMENTS FOR SUPER S CODE DEFINITION (ISO 18103:2015)
    DD CEN ISO/TS 22117 : 2010 MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - SPECIFIC REQUIREMENTS AND GUIDANCE FOR PROFICIENCY TESTING BY INTERLABORATORY COMPARISON
    ISO/TS 20612:2007 Water quality Interlaboratory comparisons for proficiency testing of analytical chemistry laboratories
    ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
    BS ISO 11352 : 2012 WATER QUALITY - ESTIMATION OF MEASUREMENT UNCERTAINTY BASED ON VALIDATION AND QUALITY CONTROL DATA
    BS EN 16101:2012 Water quality. Guidance standard on interlaboratory comparison studies for ecological assessment
    CEI UNI EN ISO/IEC 17043 : 2011 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    BS EN ISO 18103 : 2015 SUPERFINE WOVEN WOOL FABRIC LABELLING - REQUIREMENTS FOR SUPER S CODE DEFINITION
    18/30329940 DC : DRAFT FEB 2018 BS ISO 20046 - RADIOLOGICAL PROTECTION - PERFORMANCE CRITERIA FOR LABORATORIES USING FLUORESCENCE IN SITU HYBRIDIZATION (FISH) TRANSLOCATION ASSAY FOR ASSESSMENT OF OVEREXPOSURE TO IONIZING RADIATION
    ISO Guide 80:2014 Guidance for the in-house preparation of quality control materials (QCMs)
    EN ISO 20418-1 : 2018 TEXTILES - QUALITATIVE AND QUANTITATIVE PROTEOMIC ANALYSIS OF SOME ANIMAL HAIR FIBRES - PART 1: PEPTIDE DETECTION USING LC-ESI-MS WITH PROTEIN REDUCTION (ISO 20418-1:2018)
    BS EN ISO 20536 : 2017 FOOTWEAR - CRITICAL SUBSTANCES POTENTIALLY PRESENT IN FOOTWEAR AND FOOTWEAR COMPONENTS - DETERMINATION OF PHENOL IN FOOTWEAR MATERIALS (ISO 20536:2017)
    DIN EN ISO 18103 E : 2015 SUPERFINE WOVEN WOOL FABRIC LABELLING - REQUIREMENTS FOR SUPER S CODE DEFINITION (ISO 18103:2015)
    UNI CEI 70099 : 2008 INTERNATIONAL VOCABULARY OF METROLOGY - BASIC AND GENERAL CONCEPTS AND ASSOCIATED TERMS (VIM)
    UNI EN 16101 : 2013 WATER QUALITY - GUIDANCE STANDARD ON INTERLABORATORY COMPARISON STUDIES FOR ECOLOGICAL ASSESSMENT
    ISO 20536:2017 Footwear Critical substances potentially present in footwear and footwear components Determination of phenol in footwear materials
    I.S. EN ISO 20536:2017 FOOTWEAR - CRITICAL SUBSTANCES POTENTIALLY PRESENT IN FOOTWEAR AND FOOTWEAR COMPONENTS - DETERMINATION OF PHENOL IN FOOTWEAR MATERIALS (ISO 20536:2017)
    ISO/TR 13519:2012 Guidance on the development and use of ISO statistical publications supported by software
    CEI UNI 70099 : 2010 INTERNATIONAL VOCABULARY OF METROLOGY - BASIC AND GENERAL CONCEPTS AND ASSOCIATED TERMS (VIM)
    I.S. EN ISO 18254-1:2016 TEXTILES - METHOD FOR THE DETECTION AND DETERMINATION OF ALKYLPHENOL ETHOXYLATES (APEO) - PART 1: METHOD USING HPLC - MS (ISO 18254-1:2016)
    I.S. EN ISO 20418-1:2018 TEXTILES - QUALITATIVE AND QUANTITATIVE PROTEOMIC ANALYSIS OF SOME ANIMAL HAIR FIBRES - PART 1: PEPTIDE DETECTION USING LC-ESI-MS WITH PROTEIN REDUCTION (ISO 20418-1:2018)
    S.R. CEN/TS 16800:2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    I.S. EN ISO 18103:2015 SUPERFINE WOVEN WOOL FABRIC LABELLING - REQUIREMENTS FOR SUPER S CODE DEFINITION (ISO 18103:2015)
    I.S. EN ISO 16198:2015 SOIL QUALITY - PLANT-BASED TEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS (ISO 16198:2015)
    ISO/TR 18336:2016 Guidelines for good XRF laboratory practice for the iron ore industry
    UNE-EN 16101:2013 Water quality - Guidance standard on interlaboratory comparison studies for ecological assessment
    UNI CEN ISO/TS 22117 : 2011 MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - SPECIFIC REQUIREMENTS AND GUIDANCE FOR PROFICIENCY TESTING BY INTERLABORATORY COMPARISON
    EN ISO 1833-22 : 2013 TEXTILES - QUANTITATIVE CHEMICAL ANALYSIS - PART 22: MIXTURES OF VISCOSE OR CERTAIN TYPES OF CUPRO OR MODAL OR LYOCELL AND FLAX FIBRES (METHOD USING FORMIC ACID AND ZINC CHLORIDE) (ISO 1833-22:2013)
    UNI EN ISO 1833-22 : 2013 TEXTILES - QUANTITATIVE CHEMICAL ANALYSIS - PART 22: MIXTURES OF VISCOSE OR CERTAIN TYPES OF CUPRO OR MODAL OR LYOCELL AND FLAX FIBRES (METHOD USING FORMIC ACID AND ZINC CHLORIDE)
    UNE-EN ISO 18103:2015 Superfine woven wool fabric labelling - Requirements for Super S code definition (ISO 18103:2015)
    S.R. CEN/TR 16420:2012 ANALYTICAL METHOD FOR THE ANALYSIS OF PROPICONAZOLE IN TREATED WOOD SAMPLES
    UNI CEI EN ISO/IEC 17043 : 2010 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    06/30112308 DC : 0 EN ISO 13530 - WATER QUALITY - GUIDANCE ON ANALYTICAL QUALITY CONTROL FOR CHEMICAL AND PHYSICOCHEMICAL WATER ANALYSIS
    DIN EN ISO 18254-1 E : 2016 TEXTILES - METHOD FOR THE DETECTION AND DETERMINATION OF ALKYLPHENOL ETHOXYLATES (APEO) - PART 1: METHOD USING HPLC-MS (ISO 18254-1:2016)
    ISO Guide 35:2017 Reference materials Guidance for characterization and assessment of homogeneity and stability
    IEC TR 62970:2016 Guidance on how to conduct round robin tests for household and similar electrical appliances
    ISO 18254-1:2016 Textiles Method for the detection and determination of alkylphenol ethoxylates (APEO) Part 1: Method using HPLC-MS
    ISO/TS 13530:2009 Water quality Guidance on analytical quality control for chemical and physicochemical water analysis
    BS EN 12311-2 : 2013 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING
    DIN EN 12311-2:2013-11 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING
    ISO 1833-22:2013 Textiles Quantitative chemical analysis Part 22: Mixtures of viscose or certain types of cupro or modal or lyocell and flax fibres (method using formic acid and zinc chloride)
    ISO/IEC 17043:2010 Conformity assessment General requirements for proficiency testing
    BS EN 14176:2017 Foodstuffs. Determination of domoic acid in raw shellfish, raw finfish and cooked mussels by RP-HPLC using UV detection
    ISO/TS 22117:2010 Microbiology of food and animal feeding stuffs Specific requirements and guidance for proficiency testing by interlaboratory comparison
    ISO 16198:2015 Soil quality Plant-based test to assess the environmental bioavailability of trace elements to plants
    DIN EN 12311-2 E : 2013 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING
    UNE-EN 14176:2017 Foodstuffs - Determination of domoic acid in raw shellfish, raw finfish and cooked mussels by RP-HPLC using UV detection
    UNE-EN 12311-2:2013 Flexible sheets for waterproofing - Determination of tensile properties - Part 2: Plastic and rubber sheets for roof waterproofing
    ISO 18103:2015 Superfine woven wool fabric labelling Requirements for Super S code definition
    I.S. EN 12311-2:2013 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING
    I.S. EN 14176:2017 FOODSTUFFS - DETERMINATION OF DOMOIC ACID IN RAW SHELLFISH, RAW FINFISH AND COOKED MUSSELS BY RP-HPLC USING UV DETECTION
    CEN/TS 16800 : 2015 GUIDELINE FOR THE VALIDATION OF PHYSICO-CHEMICAL ANALYTICAL METHODS
    EN 12311-2:2013 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING
    CLC/TR 50619 : 2014 GUIDANCE ON HOW TO CONDUCT ROUND ROBIN TESTS
    CEN/TR 16420 : 2012 ANALYTICAL METHOD FOR THE ANALYSIS OF PROPICONAZOLE IN TREATED WOOD SAMPLES
    DIN EN 14176:2017-03 FOODSTUFFS - DETERMINATION OF DOMOIC ACID IN RAW SHELLFISH, RAW FINFISH AND COOKED MUSSELS BY RP-HPLC USING UV DETECTION
    CEN ISO/TS 22117 : 2010 MICROBIOLOGY OF FOOD AND ANIMAL FEEDING STUFFS - SPECIFIC REQUIREMENTS AND GUIDANCE FOR PROFICIENCY TESTING BY INTERLABORATORY COMPARISON
    DIN EN ISO/IEC 17043:2010-05 Conformity assessment - General requirements for proficiency testing (ISO/IEC 17043:2010)
    EN ISO 18103 : 2015 SUPERFINE WOVEN WOOL FABRIC LABELLING - REQUIREMENTS FOR SUPER S CODE DEFINITION (ISO 18103:2015)
    EN ISO/IEC 17043 : 2010 CONFORMITY ASSESSMENT - GENERAL REQUIREMENTS FOR PROFICIENCY TESTING
    EN 16101 : 2012 WATER QUALITY - GUIDANCE STANDARD ON INTERLABORATORY COMPARISON STUDIES FOR ECOLOGICAL ASSESSMENT
    EN ISO 16198 : 2015 SOIL QUALITY - PLANT-BASED TEST TO ASSESS THE ENVIRONMENTAL BIOAVAILABILITY OF TRACE ELEMENTS TO PLANTS (ISO 16198:2015)
    EN 14176:2017 (edition 2) Foodstuffs - Determination of domoic acid in raw shellfish, raw finfish and cooked mussels by RP-HPLC using UV detection
    UNI EN 12311-2 : 2013 FLEXIBLE SHEETS FOR WATERPROOFING - DETERMINATION OF TENSILE PROPERTIES - PART 2: PLASTIC AND RUBBER SHEETS FOR ROOF WATERPROOFING

    Standards Referencing This Book - (Show below) - (Hide below)

    ISO/IEC 17025:2005 General requirements for the competence of testing and calibration laboratories
    ISO 5725-1:1994 Accuracy (trueness and precision) of measurement methods and results Part 1: General principles and definitions
    ISO 11843-2:2000 Capability of detection Part 2: Methodology in the linear calibration case
    ISO 11843-1:1997 Capability of detection Part 1: Terms and definitions
    ISO 11352:2012 Water quality Estimation of measurement uncertainty based on validation and quality control data
    ISO 16269-4:2010 Statistical interpretation of data Part 4: Detection and treatment of outliers
    ISO 5725-3:1994 Accuracy (trueness and precision) of measurement methods and results Part 3: Intermediate measures of the precision of a standard measurement method
    ISO 5725-6:1994 Accuracy (trueness and precision) of measurement methods and results Part 6: Use in practice of accuracy values
    ISO Guide 35:2017 Reference materials Guidance for characterization and assessment of homogeneity and stability
    ISO 5725-4:1994 Accuracy (trueness and precision) of measurement methods and results Part 4: Basic methods for the determination of the trueness of a standard measurement method
    ISO/IEC 17011:2004 Conformity assessment General requirements for accreditation bodies accrediting conformity assessment bodies
    ISO/IEC Guide 99:2007 International vocabulary of metrology Basic and general concepts and associated terms (VIM)
    ISO 3534-2:2006 Statistics Vocabulary and symbols Part 2: Applied statistics
    ISO/IEC 17043:2010 Conformity assessment General requirements for proficiency testing
    ISO Guide 30:2015 Reference materials Selected terms and definitions
    ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
    ISO 5725-5:1998 Accuracy (trueness and precision) of measurement methods and results Part 5: Alternative methods for the determination of the precision of a standard measurement method
    ISO/IEC Guide 98-3:2008 Uncertainty of measurement Part 3: Guide to the expression of uncertainty in measurement (GUM:1995)
    ISO 3534-1:2006 Statistics Vocabulary and symbols Part 1: General statistical terms and terms used in probability
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