Title: mean squared error of calibration Long Title: IUPAC Gold Book - mean squared error of calibration DOI: 10.1351/goldbook.10151 Status: current Definition In calibration for \(N\) calibration data where \(c_{i}\) is an observed value and \(\hat c_{i}\) is the value predicted by the calibration function. \[E_{\rm{MSEC}} = \frac{\sum\limits_{i\,=\,1}^{i\,=\,N} (\hat c_{i} - c_{i})^2}{N}\] Note Mean squared error of calibration is the square of the root mean squared error of calibration. Related Term - root mean squared error of calibration: https://goldbook.iupac.org//terms/view/10157 Source - PAC, 2016, 88, 407. 'Vocabulary of concepts and terms in chemometrics (IUPAC Recommendations 2016)' on page 434 (https://doi.org/10.1515/pac-2015-0605) Other Outputs - html: https://goldbook.iupac.org/terms/view/10151/html - json: https://goldbook.iupac.org/terms/view/10151/json - xml: https://goldbook.iupac.org/terms/view/10151/xml Citation: Citation: 'mean squared error of calibration' in IUPAC Compendium of Chemical Terminology, 5th ed. International Union of Pure and Applied Chemistry; 2025. Online version 5.0.0, 2025. 10.1351/goldbook.10151 License: The IUPAC Gold Book is licensed under Creative Commons Attribution-ShareAlike CC BY-SA 4.0 International (https://creativecommons.org/licenses/by-sa/4.0/) for individual terms. Collection: If you are interested in licensing the Gold Book for commercial use, please contact the IUPAC Executive Director at executivedirector@iupac.org . Disclaimer: The International Union of Pure and Applied Chemistry (IUPAC) is continuously reviewing and, where needed, updating terms in the Compendium of Chemical Terminology (the IUPAC Gold Book). Users of these terms are encouraged to include the version of a term with its use and to check regularly for updates to term definitions that you are using. Accessed: 2026-04-19T00:31:49+00:00