{"term":{"id":"00440","doi":"10.1351\/goldbook.A00440","code":"A00440","status":"current","longtitle":"IUPAC Gold Book - arithmetic mean (average)","title":"arithmetic mean","version":"2.0.2","lastupdated":"2008-10-07","definitions":[{"id":"1","text":"The sum of a series of observations divided by the number of observations. Symbol: x(bar). It can be calculated by the formula: ","notes":{"1":"All summations are taken from 1 to n. Note that the arithmetic mean is an unbiased estimate of the population mean, i.e. µ is the limiting value for x(bar), as n -> ∞."},"math":[{"alttext":"x(bar)","latex":"\\bar{x}"},{"meaning":"Arithmetic mean","type":"equation","alttext":"x(bar) = ∑xi\/n","latex":"\\bar{x}=\\frac{\\sum x_{i}}{n}"},{"alttext":"n","latex":"n"},{"alttext":"µ","latex":"\\mu"},{"alttext":"x(bar)","latex":"\\bar{x}"},{"alttext":"n -> ∞","latex":"n\\rightarrow \\infty"}],"sources":["PAC, 1994, 66, 595. 'Nomenclature for the presentation of results of chemical analysis (IUPAC Recommendations 1994)' on page 599 (https:\/\/doi.org\/10.1351\/pac199466030595)"]}],"referencedin":[{"title":"Wikipedia - Media (statistica) (it)","url":"https:\/\/it.wikipedia.org\/wiki\/Media_(statistica)"}],"links":{"html":"https:\/\/goldbook.iupac.org\/terms\/view\/A00440\/html","json":"https:\/\/goldbook.iupac.org\/terms\/view\/A00440\/json","xml":"https:\/\/goldbook.iupac.org\/terms\/view\/A00440\/xml","plain":"https:\/\/goldbook.iupac.org\/terms\/view\/A00440\/plain","pdf":"https:\/\/goldbook.iupac.org\/terms\/view\/A00440\/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). Online version (2019-) created by S. J. Chalk. ISBN 0-9678550-9-8. https:\/\/doi.org\/10.1351\/goldbook.","license":"Licensed under Creative Commons Attribution-NoDerivatives (CC BY-NC-ND) 4.0 International (https:\/\/creativecommons.org\/licenses\/by-nc-nd\/4.0\/)","collection_reuse":"For parties interested in reusing the entire IUPAC Gold Book please contact IUPAC here https:\/\/www.cognitoforms.com\/IUPAC1\/ContactInformationForm","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":"2023-06-10T08:26:47+00:00"}}