NS EN ISO 20988 : 1ED 2007

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

Provides comprehensive guidance and specific statistical procedures for uncertainty estimation in air quality measurements including measurements of ambient air, stationary source emissions, indoor air, workplace atmospheres and meteorology.