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1.1 This guide covers elementary statistical methods for the analysis of data common to weathering experiments. The methods are for decision making, in which the experiments are designed to test a hypothesis on a single response variable. The methods work for either natural or laboratory weathering.
1.2 Only basic statistical methods are presented. There are many additional methods which may or may not be applicable to weathering tests that are not covered in this guide.
1.3 This guide is not intended to be a manual on statistics, and therefore some general knowledge of basic and intermediate statistics is necessary. The text books referenced at the end of this guide are useful for basic training.
1.4 This guide does not provide a rigorous treatment of the material. It is intended to be a reference tool for the application of practical statistical methods to real-world problems that arise in the field of durability and weathering. The focus is on the interpretation of results. Many books have been written on introductory statistical concepts and statistical formulas and tables. The reader is referred to these for more detailed information. Examples of the various methods are included. The examples show typical weathering data for illustrative purposes, and are not intended to be representative of specific materials or exposures.
2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.
E41 Terminology Relating To Conditioning
G113 Terminology Relating to Natural and Artificial Weathering Tests of Nonmetallic Materials
G141 Guide for Addressing Variability in Exposure Testing of Nonmetallic Materials
ISO DocumentsISO 3534/1 Vocabulary and Symbols - Part 1: Probability and General Statistical Terms Available from American National Standards Institute, 11 W. 42nd St., 13th Floor, New York, NY 10036. ISO 3534/3 Vocabulary and Symbols - Part 3: Design of Experiments
ICS Number Code 19.040 (Environmental testing)
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ASTM G169-01, Standard Guide for Application of Basic Statistical Methods to Weathering Tests, ASTM International, West Conshohocken, PA, 2001, www.astm.orgBack to Top