ASTM G169-2021發(fā)行信息

標(biāo)準(zhǔn)號ASTM G169-01(2021)

中文名自然老化試驗基本統(tǒng)計方法應(yīng)用的標(biāo)準(zhǔn)指南

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

發(fā)布日期2021

實(shí)施日期

廢止日期無

中國標(biāo)準(zhǔn)分類號A41

國際標(biāo)準(zhǔn)分類號19.040 (Environmental testing)

發(fā)布單位US-ASTM

ASTM G169-2021適用范圍

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“本指南涵蓋了風(fēng)化試驗常用數(shù)據(jù)分析的基本統(tǒng)計方法。這些方法是用于決策的，在決策過程中，實(shí)驗被設(shè)計用來檢驗單個響應(yīng)變量的假設(shè)。這些方法適用于自然風(fēng)化或?qū)嶒炇绎L(fēng)化。

1.2“僅提供基本統(tǒng)計方法。有許多其他方法可能適用于也可能不適用于本指南未涵蓋的風(fēng)化試驗。

1.3“本指南并非統(tǒng)計手冊，因此需要一些基礎(chǔ)和中間統(tǒng)計的一般知識。本指南末尾引用的教科書對于基礎(chǔ)培訓(xùn)非常有用。

1.4“本指南未對材料進(jìn)行嚴(yán)格處理。它旨在成為一個參考工具，用于將實(shí)用統(tǒng)計方法應(yīng)用于耐久性和風(fēng)化領(lǐng)域中出現(xiàn)的實(shí)際問題。重點(diǎn)是對結(jié)果的解釋。許多書都是關(guān)于介紹性統(tǒng)計概念、統(tǒng)計公式和表格的。讀者可參考這些文件以獲得更詳細(xì)的信息。包括各種方法的示例。示例顯示了用于說明目的的典型風(fēng)化數(shù)據(jù)，并不代表特定材料或暴露。

1.5“本國際標(biāo)準(zhǔn)是根據(jù)世界貿(mào)易組織技術(shù)性貿(mào)易壁壘（TBT）委員會發(fā)布的《關(guān)于制定國際標(biāo)準(zhǔn)、指南和建議的原則的決定》中確立的國際公認(rèn)標(biāo)準(zhǔn)化原則制定的。