Accession Number : ADA116353

Title :   Statistical Guide for Determining the Equivalency of Two Chemical Test Methods,


Personal Author(s) : Bixon,Eric R

PDF Url : ADA116353

Report Date : Apr 1982

Pagination or Media Count : 108

Abstract : This paper is designed as a statistical guide for determining the equivalency of two chemical test methods. A variety of tests are performed on the data which is obtained by two methods: (a) Method 1 is the specified method that has been referred to in the specification; and (b) Method 2 is the proposed method which is being compared to the specified method to determine if it is equivalent or not. The term equivalency must be defined for this paper. In general the equivalency of two test methods implies that the methods have the same accuracy and the same precision. This is the only case in which the two test methods may be deemed equivalent. If method 1 is more or less accurate or precise than method 2, then the methods are not equivalent. This guide is divided into four parts. The first two parts represent data which must be gathered and treated by the proponent of the new test method. The results obtained in this section will provide guidance as to whether a round robin should even be performed. If the results obtained in the first two parts indicate that the proposed test method may be an equivalent method, then the round robin should be organized and the data obtained for treatment in Parts 3 and 4.

Descriptors :   *Statistical analysis, *Chemical analysis, *Test methods, *Handbooks, Standards, Accuracy, Comparison, Requirements, Specifications, Methodology

Subject Categories : Physical Chemistry
      Statistics and Probability

Distribution Statement : APPROVED FOR PUBLIC RELEASE