ASTM D3980-88

Practice for Interlaboratoy Testing of Paint and Related Materials (Withdrawn 1998)

General Information

• Status: Withdrawn
• Withdrawal Date: 09-Feb-1998
• ICS: 87.040 - Paints and varnishes
• Technical Committee: D01 - Paint and Related Coatings, Materials, and Applications
• Drafting Committee: D01.20 - Quality Assurance and Statistics

Standards Content (Sample)

ASTM D3780 ô8 0759530 0033387 2
@) Designation: D 3980 - 88
Standard Practice for
Interlaboratory Testing of Paint and Related Materials'
This standard is issued under the fixed designation D 3980; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in pa'rentheses indicates the year of last reapproval. A
superscript epsilon (E) indicates an editorial change since the last revision or reapproval.
1. Scope degree of replication and repetition. The expenmental design
should provide the basis for an efficient statistical analysis of
1.1 This practice covers the interlaboratory testing of
the results (see Part By Planning).
paint and related materials. The information presented is
3.3 replication-the execution of multiple chemical or
intended to assist task groups in the effective planning of
physical determinations on the same specimen or physical
round-robin test programs.
measurements on the same panel at the same time, as closely
1.2 The various parts appear in the following order:
as possible. Two replicates are called duplicates, three are
Sections
called triplicates, etc. The individual results are not suitable
Part A-Definitions 3
for estimating precision but are used only to ensure by
Part B-Planning 4t0 11
12 to 16
Part C-Statistical Analysis
comparison with similar measurements that there is not a
Part %Analysis Presentation 17 to 20
gross error among them (see 15.1.3.3).
1.3 This practice, in spite of its length, is not intended to
3.4 repetition-The execution of multiple physical mea-
cover all aspects of statistical design and analysis. For
surements on the same panel or chemical determinations at
example, the analysis of variance used in the practice as the
different times, or physical measurements on different
basis for estimating the precision is abridged in comparison
panels, areas of large structures, or specimens of a liquid
to that normally used for establishing the significance of
sample within a short time interval, to establish the precision
experimental factors. The publications listed in the appendix
of a method. In most cases the measurements are the mean
should be consulted for further information or explanations.
of replicates as defined in 3.3.
For convenience, comparable practices developed by other
3.5 population-the totality of observations on or deter-
ASTM technical committees are also shown.
minations of a certain property or component obtained by
the same procedure; theoretically, an infinite collection of
2. Referenced Documents
measurements on a given item of interest but, practically, a
2.1 ASTM Standards: large number of measurements of the item. Thus, when
D 968 Test Methods for Abrasion Resistance of Organic statistical procedures are used to determine whether or not
Coatings by the Falling Abrasive Teste? two (or more) materials or test methods differ significantly
D 3793 Test Method for Low-Temperature Coalescence of with respect to some measurable property, in effect, the
Latex Paint Films'
determination is whether these materials belong to the same
E 180 Practice for Determining the Precision of ASTM
or to different populations.
Methods for Analysis and Testing of Industrial
3.6 sample-a randomly selected subset of a population
Chemicals3
so as to enable obtaining
intended to be representative of it
an estimate of the property or composition of the entire
PART A-TERMINOLOGY
population. The reliability of such an estimate can be
expressed in terms of confidence limits (see 3.19). Through
3. Definitions
tests of significance (see 3.21), it is possible to state, with a
3.1 The statistical terms used in this practice are defined,
specified degree of confidence, whether two or more samples
as nearly as possible, in every day language. For convenience,
are drawn from the same or from different populations.
-
the terms are listed in order of use in this practice.
3.7 average-a typical numerical value that attempts to
3.2 experimental design-the complete plan for con-
summarize or reflect the location of a group of observations
ducting an investigation or an interlaboratory study of
by a single number. While it is a measure of central
materials, processes, or test methods. It is conveniently set
tendency, it does not provide information on the variability
forth in the form of a single comprehensive table showing
of the individual observations. The following are different
number of laboratories, materials to be tested, test methods,
types of averages: arithmetic mean, weighted mean, algebraic
number of operators, testing conditions, time of testing, and
-
mean, geometric mean, harmonic mean, median, and mode.
3.7.1 mean (arithmetic)-the value obtained by dividing
the sum of a set of observations or results by their number.
I This practice is under the jurisdiction ofASTM Committee DI
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