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Created page with 'File:lighterstill.jpg ==Etymology== [http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Middle French fac...'
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==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Middle French facteur, from [[Latin]] factor doer, from facere
*Date: [http://www.wikpedia.org/wiki/15th_Century 15th century]
==Definition==
*1 : one who acts or transacts [[business]] for another: as a : broker
:b : one that lends [[money]] to producers and dealers (as on the [[security]] of accounts receivable)
*2 a (1) : one that [[actively]] contributes to the production of a result : ingredient <price wasn't a factor in the decision> (2) : a substance that [[functions]] in or promotes the function of a particular physiological [[process]] or [[bodily]] [[system]]
:b : a good or [[service]] used in the [[process]] of production
*3 : gene
*4 a : any of the [[numbers]] or [[symbols]] in [[mathematics]] that when multiplied together form a product; also : a number or symbol that divides another number or symbol
:b : a [[quantity]] by which a given quantity is multiplied or divided in order to indicate a [[difference]] in [[measurement]] <costs increased by a factor of 10>
==Description==
'''Factor''' [[analysis]] is a [[statistical]] [[method]] used to describe variability among [[observed]] variables in terms of a [[potentially]] lower [[number]] of unobserved variables called factors. In other [[words]], it is [[possible]], for example, that two or three observed variables together [[represent]] another, unobserved variable, and ''factor analysis'' searches for these possible combinations. The observed variables are [[modeled]] as [[linear]] combinations of the potential factors, plus "error" terms. The [[information]] gained about the [[interdependencies]] between observed variables can be used later to reduce the set of variables in a [[data]]set. Factor analysis originated in [http://en.wikipedia.org/wiki/Psychometrics psychometrics], and is used in [[Psychology|behavioral sciences]], [[social sciences]], marketing, product management, operations [[research]], and other applied sciences that deal with large [[quantities]] of [[data]].[http://en.wikipedia.org/wiki/Factor_analysis]
[[Category: Statistics]]
==Etymology==
[http://nordan.daynal.org/wiki/index.php?title=English#ca._1100-1500_.09THE_MIDDLE_ENGLISH_PERIOD Middle English], from Middle French facteur, from [[Latin]] factor doer, from facere
*Date: [http://www.wikpedia.org/wiki/15th_Century 15th century]
==Definition==
*1 : one who acts or transacts [[business]] for another: as a : broker
:b : one that lends [[money]] to producers and dealers (as on the [[security]] of accounts receivable)
*2 a (1) : one that [[actively]] contributes to the production of a result : ingredient <price wasn't a factor in the decision> (2) : a substance that [[functions]] in or promotes the function of a particular physiological [[process]] or [[bodily]] [[system]]
:b : a good or [[service]] used in the [[process]] of production
*3 : gene
*4 a : any of the [[numbers]] or [[symbols]] in [[mathematics]] that when multiplied together form a product; also : a number or symbol that divides another number or symbol
:b : a [[quantity]] by which a given quantity is multiplied or divided in order to indicate a [[difference]] in [[measurement]] <costs increased by a factor of 10>
==Description==
'''Factor''' [[analysis]] is a [[statistical]] [[method]] used to describe variability among [[observed]] variables in terms of a [[potentially]] lower [[number]] of unobserved variables called factors. In other [[words]], it is [[possible]], for example, that two or three observed variables together [[represent]] another, unobserved variable, and ''factor analysis'' searches for these possible combinations. The observed variables are [[modeled]] as [[linear]] combinations of the potential factors, plus "error" terms. The [[information]] gained about the [[interdependencies]] between observed variables can be used later to reduce the set of variables in a [[data]]set. Factor analysis originated in [http://en.wikipedia.org/wiki/Psychometrics psychometrics], and is used in [[Psychology|behavioral sciences]], [[social sciences]], marketing, product management, operations [[research]], and other applied sciences that deal with large [[quantities]] of [[data]].[http://en.wikipedia.org/wiki/Factor_analysis]
[[Category: Statistics]]