BS 903-2:1997

Foreword
Introduction
1 Scope
2 Informative references
3 Definitions
4 Symbols
5 Limitations of test results
6 Distribution of results and measures of central
    tendency
7 Confidence limits and significant difference
8 Ranking methods
9 Criteria for rejecting outliers
10 Analysis of variance
11 Regression analysis
12 Uncertainty of measurement
13 Sampling
14 Number of test pieces
15 Expression of results
16 Precision statements
17 Design of experiments
18 Statistical quality control
Annexes
A (informative) Mathematical form of the distribution
    functions referenced in this British Standard
B (informative) Additional forms of mean value
C (informative) Inter-relationships for measures of central
    tendency in the double exponential and Weibull
    distributions
D (informative) Equation for the calculation of standard
    deviation
E (informative) Construction of Weibull probability
    paper
F (informative) Equations for the calculation of Student's
    t values
G (informative) Testing the coefficient of concordance
H (informative) Analysis of variance
J (informative) Equations for the calculation of
    regression coefficients
K (informative) The intercal method
Tables
1 Tensile strength measurements from one batch of rubber
2 Tensile strength measurements from three materials
3 Table of factors for converting range to standard
    deviation
4 Plot positions for the double exponential distribution
5 Tensile strength measurements
6 Calculated values for tensile strength measurements
7 Tension fatigue test measurements
8 Electrical resistivity measurements
9 Hardness measurements
10 Calculated values for hardness measurements
11 A selected table of student's t values
12 t value constants
13 A selected table of chi-square values
14 Statistics for observation sets
15 Snedecor's F values for selected degrees of freedom
16 Percentage stress relaxation measurements
17 Lower confidence limits for percentage stress
    relaxation
18 Tear tests
19 Friedman's test: critical values K for a = 0.05
    level of significance
20 Vulcanizate test results
21 Vulvsnizate test statistical calculations
22 Critical values for Dixon's test
23 Critical values for Cochran's test
24 Compression set results
25 Sorted compression set results
26 Volume swell test 1
27 Volume swell test 2
28 One factor statistics summary
29 Abrasion volume loss results
30 Table of sums
31 Analysis of variance
32 Compression set measurements after 7 days ageing
33 Transformed compression set variables
34 Comparison of compression set values
35 Tensile strengths after ageing
36 Measurements of temperature of retraction
37 Retraction value results
38 Table of elongation at break values
39 Volume swell measurements
40 Inferences from a two-sided test
41 Observation points
42 Z-scores
43 Experimental design for nitrile rubber compound
    development (full factorial)
44 Experimental design for nitrile rubber compound
    development (quarter factorial)
45 Experimental specification for nitrile rubber compound
    development (quadratic response function)
46 Experimental design for nitrile rubber compound
    development (quadratic response function)
47 Hardness results
48 Cusum table for mean strength values
    D.1 Standard deviation comparisons
    F.1 Constants for t value calculations
    H.1 Three-factor analysis of variance
    H.2 Revised parameters
Figures
1 Gaussian (normal) density function
2 Double exponential density function
3 Weibull density function
4 Bimodal density function
5 Graphical representation of mean and median data for
    three compounds
6 Fatigue data: normal plot
7 Fatigue data: Weibull plot
8 Histogram of elongation at break data
9 Linear relationship between the dependent variable and
    a control variable
10 A two-level single factor experimental design
11 A two-level two factor experimental design
12 A two-level three factor experimental design
13 Quadratic relationship between the dependent variable
    and a control variable
14 Control chart of mean hardness values
15 Control chart of hardness standard deviation values
16 Control chart of mean tensile strength
17 Cusum chart of mean tensile strength
List of references

It is intended not to conflict with or replace existing British standards covering basic statistical techniques, but rather to complement them and provide examples of those techniques applied to particular rubber testing situations.