{"term":{"metadata":{"id":"04968","doi":"10.1351\/goldbook.Q04968","code":"Q04968","status":"current","longtitle":"IUPAC Gold Book - quadratic mean, ̄x_q","title":"quadratic mean","contexts":[],"index":null,"version":"2.3.3","lastupdated":"2014-02-24"},"definitions":{"definition":[{"id":"1","text":"The square root of the expression in which the sum of squared observations is divided by the number n. It can be calculated by the formula: ","contexts":{"in":[],"of":[]},"chemicals":[],"links":[],"math":[{"meaning":null,"type":null,"latex":"n"},{"meaning":null,"type":null,"latex":"\\overline{x}_{\\text{q}}=\\sqrt{\\frac{\\sum x_{i}^{2}}{n}}"}],"sources":["PAC, 1994, *66<\/em>, 595. 'Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)' on page 602 (https:\/\/doi.org\/10.1351\/pac199466030595)"]}]},"links":{"html":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Q04968\/html","json":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Q04968\/json","xml":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Q04968\/xml","plain":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Q04968\/plain","pdf":"http:\/\/dev.goldbook.iupac.org\/terms\/view\/Q04968\/pdf","originalpdf":"http:\/\/iupac.org\/goldbook\/Q04968.pdf"},"citeas":"IUPAC. Compendium of Chemical Terminology, 2nd ed. (the \"Gold Book\"). Compiled by A. D. McNaught and A. Wilkinson. Blackwell Scientific Publications, Oxford (1997). XML on-line corrected version: http:\/\/goldbook.iupac.org (2006-) created by M. Nic, J. Jirat, B. Kosata; updates compiled by A. Jenkins. ISBN 0-9678550-9-8. https:\/\/doi.org\/10.1351\/goldbook.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC-BY-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nd\/4.0\/)","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":"2020-07-06T06:37:19+00:00"}}*