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# About: Continuous Random Variables: The Exponential Distribution

Module by: Susan Dean, Barbara Illowsky, Ph.D.. E-mail the authors

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 Name: Continuous Random Variables: The Exponential Distribution ID: m16816 Language: English (en) Summary: This module introduces the properties of the exponential distribution, the behavior of probabilities that reflect a large number of small values and a small number of high values. Subject: Mathematics and Statistics Keywords: continuous, distribution, elementary, exponential, function, random, statistics, variable License: Creative Commons Attribution License CC-BY 3.0 Authors: Copyright Holders: Maintainers: Latest version: 1.15 (history) First publication date: Jun 6, 2008 9:52 am +0000 Last revision to module: May 27, 2012 1:19 pm +0000

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## Version History

 Version: 1.15 May 27, 2012 1:19 pm +0000 by Changes: `Continuous Random Variables: The Exponential Distribution: Updated notation.` Version: 1.14 Aug 15, 2011 8:39 pm +0000 by Changes: `Continuous Random Variables: The Exponential Distribution: Updated glossary item "Exponential Distribution."` Version: 1.13 Oct 12, 2009 6:26 pm +0000 by Changes: `Continuous Random Variables: The Exponential Distribution: In Example 3 Problem 1, made the following correction: P(X > 7) = e^(-1.7) = 0.4966.` Version: 1.12 Feb 20, 2009 7:43 pm +0000 by Changes: `Continuous Random Variables: The Exponential Distribution: Added the glossary item "Exponential Distribution."` Version: 1.11 Feb 20, 2009 7:29 pm +0000 by Changes: `Continuous Random Variables: The Exponential Distribution: Changed k = 16.1 years to Solve for k: k = ln(1-.80)/(-.1) = 16.1 years.` Version: 1.10 Jan 22, 2009 10:35 pm +0000 by Changes: ` Continuous Random Variables: The Exponential Distribution: For Example 2 problem solution, changed the probability question to "P(4

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

Dean, S.; Illowsky, B. Continuous Random Variables: The Exponential Distribution, OpenStax-CNX Web site. http://cnx.org/content/m16816/1.15/, May 27, 2012.

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

Dean S, Illowsky B. Continuous Random Variables: The Exponential Distribution [OpenStax-CNX Web site]. May 27, 2012. Available at: http://cnx.org/content/m16816/1.15/.

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

Dean, S., & Illowsky, B. (2012, May 27). Continuous Random Variables: The Exponential Distribution. Retrieved from the OpenStax-CNX Web site: http://cnx.org/content/m16816/1.15/

### Chicago Manual of Style (Bibliography):

Dean, Susan, and Barbara Illowsky. "Continuous Random Variables: The Exponential Distribution." OpenStax-CNX. May 27, 2012. http://cnx.org/content/m16816/1.15/.

### Chicago Manual of Style (Note):

Susan Dean and Barbara Illowsky, "Continuous Random Variables: The Exponential Distribution," OpenStax-CNX, May 27, 2012, http://cnx.org/content/m16816/1.15/.

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

Dean, S., & Illowsky, B. 2012. Continuous Random Variables: The Exponential Distribution. OpenStax-CNX, May 27, 2012. http://cnx.org/content/m16816/1.15/.

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

Dean, Susan, and Barbara Illowsky. Continuous Random Variables: The Exponential Distribution. OpenStax-CNX. 27 May 2012 <http://cnx.org/content/m16816/1.15/>.