30:T486,

Mean

Another word for average. Mean almost always refers to arithmetic mean. In certain contexts, however, it could refer to the geometric mean, harmonic mean, or root mean square.

Note: For any positive numbers, harmonic mean ≤ geometric mean ≤ arithmetic mean ≤ root mean square

Four mean formulas for 4 and 9: harmonic=72/13≈5.54, geometric=√36=6, arithmetic=6.5, root mean square=√48.5≈6.96

See also

Median, mode

2e:["$","main",null,{"children":["$","article",null,{"className":"SiteLayout-module__16F2PG__card","id":"mw-main","children":[["$","div",null,{"className":"SiteLayout-module__16F2PG__cardHead","children":["$","h1",null,{"className":"SiteLayout-module__16F2PG__cardTitle","children":"Mean"}]}],["$","div",null,{"className":"SiteLayout-module__16F2PG__content","children":[false,[["$","script","0",{"type":"application/ld+json","dangerouslySetInnerHTML":{"__html":"{\"@context\":\"https://schema.org\",\"@type\":\"DefinedTerm\",\"name\":\"Mean\",\"description\":\"Mean is another word for average, usually referring to the arithmetic mean. It can also mean geometric mean, harmonic mean, or root mean square.\",\"url\":\"https://www.mathwords.com/m/mean.htm\",\"inDefinedTermSet\":{\"@type\":\"DefinedTermSet\",\"name\":\"Mathwords\",\"url\":\"https://www.mathwords.com/\"}}"}}]],[["$","div",null,{"className":"LegacyContent-module__gmcoNq__content ","dangerouslySetInnerHTML":{"__html":"$30"}}],false,false]]}]]}]}] 2f:["$","footer",null,{"className":"SiteFooter-module__C4mfIa__footer","children":["$","div",null,{"className":"SiteFooter-module__C4mfIa__inner","children":[["$","p",null,{"className":"SiteFooter-module__C4mfIa__title","children":"Mathwords: Terms and Formulas from Algebra I to Calculus"}],["$","p",null,{"className":"SiteFooter-module__C4mfIa__credit","children":["Written, illustrated by Bruce Simmons, and maintained by"," ",["$","a",null,{"href":"https://www.cazoommaths.com","target":"_blank","rel":"noopener noreferrer","children":"Cazoom Maths"}]]}],["$","p",null,{"className":"SiteFooter-module__C4mfIa__copyright","children":["Copyright © 2026 by"," ",["$","a",null,{"href":"https://www.cazoommaths.com","target":"_blank","rel":"noopener noreferrer","children":"Cazoom Maths"}],". All rights reserved."]}]]}]}]