AS/NZS ISO 20988:2024
Air quality - Guidelines for estimating measurement uncertainty
Standard identically adopts ISO 20988:2007 which provides comprehensive guidance and specific statistical procedures for uncertainty estimation in air quality measurements.
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AS/NZS ISO 20988:2024 Air quality - Guidelines for estimating measurement uncertainty
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Basic concepts
5.1 Outline
5.2 Measurement uncertainty
5.3 Correction for systematic effects
5.4 Provision of input data
6 Problem specification
6.1 Objectives
6.2 Measurement
6.3 Uncertainty parameters
6.4 Input data
6.4.1 General
6.4.2 Assessment of representativeness
6.5 Effects not described by series of observations
7 Statistical analysis
7.1 Objectives
7.2 Indirect approach
7.3 Direct approach
7.4 Statistical validity
8 Estimation of variances and covariances
8.1 General
8.2 Variance estimates of Type A
8.3 Variance estimates of Type B
8.4 Estimation of covariances
9 Evaluation of uncertainty parameters
9.1 Objective
9.2 Combined standard uncertainty
9.3 Expanded uncertainty
9.3.1 General
9.3.2 Expanded uncertainty of results exhibiting a Gaussian distribution
10 Reporting
Annex A (informative) Testing a coverage probability
Annex B (informative) Type A evaluation methods for experimental designs A1 to A8
Annex C (informative) Examples
Bibliography
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AS/NZS ISO 20988:2024 Air quality - Guidelines for estimating measurement uncertainty
Preface
Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols and abbreviated terms
5 Basic concepts
5.1 Outline
5.2 Measurement uncertainty
5.3 Correction for systematic effects
5.4 Provision of input data
6 Problem specification
6.1 Objectives
6.2 Measurement
6.3 Uncertainty parameters
6.4 Input data
6.4.1 General
6.4.2 Assessment of representativeness
6.5 Effects not described by series of observations
7 Statistical analysis
7.1 Objectives
7.2 Indirect approach
7.3 Direct approach
7.4 Statistical validity
8 Estimation of variances and covariances
8.1 General
8.2 Variance estimates of Type A
8.3 Variance estimates of Type B
8.4 Estimation of covariances
9 Evaluation of uncertainty parameters
9.1 Objective
9.2 Combined standard uncertainty
9.3 Expanded uncertainty
9.3.1 General
9.3.2 Expanded uncertainty of results exhibiting a Gaussian distribution
10 Reporting
Annex A (informative) Testing a coverage probability
Annex B (informative) Type A evaluation methods for experimental designs A1 to A8
Annex C (informative) Examples
Bibliography
AS/NZS ISO 20988:2024
Online Library subscription information
Online library subscriptions provide a cost-effective solution for organisations of any size to access the latest standards, offering 24/7 access to a personalised catalogue. The service ensures subscribers have have the most up-to-date version of selected standards, incluing automatic updates for any amendments or versions. Pricing is dependent on the chosen standards and the number of concurrent users, with discounts applied from the standards PDF price. For customised subscriptions or further inquiries, contact the Online Library team.