ASTM G169-2021

ASTM G169-2021发行信息

标准号ASTM G169-01(2021)

中文名自然老化试验基本统计方法应用的标准指南

英文名Standard Guide for Application of Basic Statistical Methods to Weathering Tests

发布日期2021

实施日期

废止日期无

中国标准分类号A41

国际标准分类号19.040 (Environmental testing)

发布单位US-ASTM

ASTM G169-2021适用范围

The correct use of statistics as part of a weathering program can greatly increase the usefulness of results. A basic understanding of statistics is required for the study of weathering performance data. Proper experimental design and statistical analysis strongly enhances decision-making ability. In weathering, there are many uncertainties brought about by exposure variability, method precision and bias, measurement error, and material variability. Statistical analysis is used to help decide which products are better, which test methods are most appropriate to gauge end use performance, and how reliable the results are.

Results from weathering exposures can show differences between products or between repeated testing. These results may show differences which are not statistically significant. The correct use of statistics on weathering data can increase the probability that valid conclusions are derived.

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.

1.5''This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

1.1“本指南涵盖了风化试验常用数据分析的基本统计方法。这些方法是用于决策的，在决策过程中，实验被设计用来检验单个响应变量的假设。这些方法适用于自然风化或实验室风化。

1.2“仅提供基本统计方法。有许多其他方法可能适用于也可能不适用于本指南未涵盖的风化试验。

1.3“本指南并非统计手册，因此需要一些基础和中间统计的一般知识。本指南末尾引用的教科书对于基础培训非常有用。

1.4“本指南未对材料进行严格处理。它旨在成为一个参考工具，用于将实用统计方法应用于耐久性和风化领域中出现的实际问题。重点是对结果的解释。许多书都是关于介绍性统计概念、统计公式和表格的。读者可参考这些文件以获得更详细的信息。包括各种方法的示例。示例显示了用于说明目的的典型风化数据，并不代表特定材料或暴露。

1.5“本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。