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# About: Mathematical Expectation: Simple Random Variables

Module by: Paul E Pfeiffer. E-mail the author

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 Name: Mathematical Expectation: Simple Random Variables ID: m23387 Language: English (en) Summary: For simple, real valued random variables, the expectation is the probability weighted average of the values taken on. It may be viewed as the center of mass for the probability mass distribution on the line. Subject: Mathematics and Statistics Keywords: affine, center of mass, distribution, expectation, function of random variables, linearity, weighted average License: Creative Commons Attribution License CC-BY 3.0 Authors: Copyright Holders: Maintainers: Latest version: 1.6 (history) First publication date: Apr 16, 2009 4:11 pm -0500 Last revision to module: Sep 18, 2009 1:17 pm -0500

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## Version History

 Version: 1.6 Sep 18, 2009 1:17 pm -0500 by Changes: `added google analytics tracking code` Version: 1.5 Jul 27, 2009 12:06 pm -0500 by Changes: `disjoint union fix` Version: 1.4 Jun 19, 2009 11:41 am -0500 by Changes: `m-file fixes, supplemental links, metadata updated` Version: 1.3 Jun 9, 2009 5:15 pm -0500 by Changes: `updated links, images and accessibility` Version: 1.2 May 26, 2009 4:39 pm -0500 by Changes: `fixed module names, and updated content structure` Version: 1.1 May 17, 2009 7:05 pm -0500 by Changes: `Initial content`

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## How to Cite and Attribute This Content

The following citation styles comply with the attribution requirements for the license (CC-BY 3.0) of this work:

### American Chemical Society (ACS) Style Guide:

Pfeiffer, P. Mathematical Expectation: Simple Random Variables, Connexions Web site. http://cnx.org/content/m23387/1.6/, Sep 18, 2009.

### American Medical Assocation (AMA) Manual of Style:

Pfeiffer P. Mathematical Expectation: Simple Random Variables [Connexions Web site]. September 18, 2009. Available at: http://cnx.org/content/m23387/1.6/.

### American Psychological Assocation (APA) Publication Manual:

Pfeiffer, P. (2009, September 18). Mathematical Expectation: Simple Random Variables. Retrieved from the Connexions Web site: http://cnx.org/content/m23387/1.6/

### Chicago Manual of Style (Bibliography):

Pfeiffer, Paul. "Mathematical Expectation: Simple Random Variables." Connexions. September 18, 2009. http://cnx.org/content/m23387/1.6/.

### Chicago Manual of Style (Note):

Paul Pfeiffer, "Mathematical Expectation: Simple Random Variables," Connexions, September 18, 2009, http://cnx.org/content/m23387/1.6/.

### Chicago Manual of Style (Reference, in Author-Date style):

Pfeiffer, P. 2009. Mathematical Expectation: Simple Random Variables. Connexions, September 18, 2009. http://cnx.org/content/m23387/1.6/.

### Modern Languages Association (MLA) Style Manual:

Pfeiffer, Paul. Mathematical Expectation: Simple Random Variables. Connexions. 18 Sep. 2009 <http://cnx.org/content/m23387/1.6/>.