<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="7.x">Drupal-Biblio</source-app><ref-type>17</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Joris Van Loco</style></author><author><style face="normal" font="default" size="100%">M. Elskens</style></author><author><style face="normal" font="default" size="100%">Croux,C.</style></author><author><style face="normal" font="default" size="100%">Beernaert,H.</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Linearity of calibration curves: use and misuse of the correlation coefficient</style></title><secondary-title><style face="normal" font="default" size="100%">Accred Qual Assur</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">ALL</style></keyword><keyword><style  face="normal" font="default" size="100%">association</style></keyword><keyword><style  face="normal" font="default" size="100%">at</style></keyword><keyword><style  face="normal" font="default" size="100%">Cadmium</style></keyword><keyword><style  face="normal" font="default" size="100%">Calibration</style></keyword><keyword><style  face="normal" font="default" size="100%">Correlation coefficient</style></keyword><keyword><style  face="normal" font="default" size="100%">Goodness of fit</style></keyword><keyword><style  face="normal" font="default" size="100%">IS</style></keyword><keyword><style  face="normal" font="default" size="100%">Lack-of-fit</style></keyword><keyword><style  face="normal" font="default" size="100%">Less</style></keyword><keyword><style  face="normal" font="default" size="100%">LEVEL</style></keyword><keyword><style  face="normal" font="default" size="100%">linear regression</style></keyword><keyword><style  face="normal" font="default" size="100%">MODEL</style></keyword><keyword><style  face="normal" font="default" size="100%">ON</style></keyword><keyword><style  face="normal" font="default" size="100%">Quality</style></keyword><keyword><style  face="normal" font="default" size="100%">r</style></keyword><keyword><style  face="normal" font="default" size="100%">regression</style></keyword><keyword><style  face="normal" font="default" size="100%">Regression model</style></keyword><keyword><style  face="normal" font="default" size="100%">result</style></keyword><keyword><style  face="normal" font="default" size="100%">results</style></keyword><keyword><style  face="normal" font="default" size="100%">standards</style></keyword><keyword><style  face="normal" font="default" size="100%">Statistical</style></keyword><keyword><style  face="normal" font="default" size="100%">Test</style></keyword><keyword><style  face="normal" font="default" size="100%">tests</style></keyword><keyword><style  face="normal" font="default" size="100%">use</style></keyword><keyword><style  face="normal" font="default" size="100%">VALIDATION</style></keyword><keyword><style  face="normal" font="default" size="100%">values</style></keyword><keyword><style  face="normal" font="default" size="100%">variables</style></keyword><keyword><style  face="normal" font="default" size="100%">Yield</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2002</style></year><pub-dates><date><style  face="normal" font="default" size="100%">0/0/2002</style></date></pub-dates></dates><number><style face="normal" font="default" size="100%">285</style></number><volume><style face="normal" font="default" size="100%">7</style></volume><pages><style face="normal" font="default" size="100%">281 - 285</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">The correlation coefficient is commonly used to evaluate the degree of linear association between two variables. However, it can be shown that a correlation coefficient very close to one might also be obtained for a clear curved relationship. Other statistical tests, like the Lack-of-fit and Mandel's fitting test thus appear more suitable for the validation of the linear calibration model. A number of cadmium calibration curves from atomic absorption spectroscopy were assessed for their linearity. All the investigated calibration curves were characterized by a high correlation coefficient (</style></abstract><issue><style face="normal" font="default" size="100%">7</style></issue><custom1><style face="normal" font="default" size="100%">2097</style></custom1><section><style face="normal" font="default" size="100%">281</style></section></record></records></xml>