BS ISO 19003:2006

Foreword
Introduction
1 Scope
2 References
3 Terms and definitions
4 Symbols
5 Limitations of test results
   5.1 Variability
   5.2 Accuracy, trueness and precision
   5.3 Relevance and significance
6 Distribution of results and measures
   of central tendency
   6.1 Principles
   6.2 Methodology
        6.2.1 Types of distribution
        6.2.2 Measures of central tendency
        6.2.3 Measures of dispersion
        6.2.4 Transformation to normal
               distribution
        6.2.5 Test of departure from normality
   6.3 Applications to rubber testing
        6.3.1 General
        6.3.2 Tensile testing
        6.3.3 Fatigue
        6.3.4 Conversion to normal distribution
        6.3.5 Other uses of the median
7 Confidence limits and significant
   difference
   7.1 Principles
   7.2 Methodology
        7.2.1 Confidence limits and confidence
               intervals
        7.2.2 Significant difference
   7.3 Applications to rubber testing
        7.3.1 General
        7.3.2 Confidence limits and specification
               limits
        7.3.3 Comparison of results
8 Ranking methods
   8.1 Principles
   8.2 Methodology
        8.2.1 Friedman's test
        8.2.2 The outside count test
   8.3 Applications to rubber testing
9 Criteria for rejecting outliers
   9.1 Principles
   9.2 Methodology
        9.2.1 General
        9.2.2 Dixon's test
        9.2.3 Cochran's test for variance
   9.3 Applications to rubber testing
        9.3.1 General
        9.3.2 Dixon's test applied to individual
               results
        9.3.3 Cochran's variance test
        9.3.4 Dixon's test applied to a group
               of mean values
10 Analysis of variance (ANOVA)
   10.1 Principles
   10.2 Methodology
        10.2.1 General
        10.2.2 One factor with an equal
               number of replicates
        10.2.3 One factor with a variable
               number of replicates
        10.2.4 Two (and over) factor analysis
               of variance
   10.3 Applications to rubber testing
11 Regression analysis
   11.1 Principles
   11.2 Methodology
        11.2.1 General
        11.2.2 Linear least squares
        11.2.3 Quadratic least squares
        11.2.4 Cubic least squares
   11.3 Applications to rubber testing
        11.3.1 General
        11.3.2 The effect of temperature on
               compression set
        11.3.3 Effect of ageing on tensile
               strength
        11.3.4 Temperature of retraction test
12 Uncertainty of measurement
   12.1 Principles
   12.2 Methodology
        12.2.1 Compilation of a single value for
               uncertainty
        12.2.2 Random uncertainty (U[r])
        12.2.3 Systematic uncertainty (U[s])
        12.2.4 Deviation of a single
               value of total uncertainty
        12.2.5 Reporting of results
   12.3 Applications to rubber testing
13 Sampling
   13.1 Principles
   13.2 Methodology
        13.2.1 General
        13.2.2 Acceptable quality level and
               limiting quality
        13.2.3 Assessment of nonconformity
        13.2.4 Inspection levels
        13.2.5 Plans for sampling by attributes
        13.2.6 Random sampling
   13.3 Applications to rubber testing
14 Number of test pieces
   14.1 Principles
   14.2 Methodology
   14.3 Applications to rubber testing
        14.3.1 General
        14.3.2 Refinement of confidence limits
        14.3.3 Refinement of a pass/fail status
15 Expression of results
   15.1 Principles
   15.2 Methodology
        15.2.1 The test report
        15.2.2 Rounding
   15.3 Applications to rubber testing
        15.3.1 General
        15.3.2 Construction of a histogram
        15.3.3 Examples of rounding
16 Precision statements
   16.1 General
   16.2 Principles
   16.3 Methodology
   16.4 Applications to rubber testing
17 Design of experiments
   17.1 General information and principles
        17.1.1 General information
        17.1.2 Principles
   17.2 Methodology
        17.2.1 General
        17.2.2 Descriptive experiments
        17.2.3 Comparative experiments
        17.2.4 Response experiments
   17.3 Applications to rubber testing
        17.3.1 Descriptive experiments
        17.3.2 Comparative experiments
        17.3.3 Response experiments
18 Statistical quality control
   18.1 Principles
   18.2 Methodology
        18.2.1 General
        18.2.2 Control charts by attributes
        18.2.3 Control charts by variables
   18.3 Applications to rubber testing
        18.3.1 General
        18.3.2 Control charts
        18.3.3 Cusum chart
Annex A (informative) - Mathematical form of the
                        distribution functions
                        referenced in this
                        International Standard
Annex B (informative) - Additional forms of mean value
Annex C (informative) - Inter-relationships for measures
                        of central tendency in the double
                        exponential and Weibull distributions
Annex D (informative) - Equation for the calculation of
                        standard deviation
Annex E (informative) - Construction of Weibull probability
                        paper
Annex F (informative) - Equations for the calculation of
                        Student's t-values
Annex G (informative) - Analysis of variance
Annex H (informative) - Equations for the calculation
                        of regression coefficients
Annex I (informative) - The intercal method
Bibliography

Gives guidance on the application of statistics to rubber testing.

This International Standard provides guidance on the application of statistics to rubber testing. It is intended not to conflict with or replace existing International Standards covering basic statistical techniques, but rather to complement them and provide examples of those techniques applied to particular rubber testing situations.