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About: Descriptive Statistics: Measuring the Spread of the Data

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

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Metadata

Name: Descriptive Statistics: Measuring the Spread of the Data
ID: m17103
Language: English (en)
Summary: Descriptive Statistics: Measuring the Spread of Data explains standard deviation as a measure of variation in data and is part of the collection col10555 written by Barbara Illowsky and Susan Dean. Roberta Bloom made contributions that helped to clarify the standard deviation and the variance.
Subject: Mathematics and Statistics
Keywords: elementary, statistics
License: Creative Commons Attribution License CC-BY 3.0

Authors: Susan Dean (susanldean45@gmail.com), Barbara Illowsky, Ph.D. (illowskybarbara@deanza.edu)
Copyright Holders: Maxfield Foundation (cnx@cnx.org)
Maintainers: Susan Dean (susanldean45@gmail.com), Barbara Illowsky, Ph.D. (illowskybarbara@deanza.edu), Connexions (cnx@cnx.org)

Latest version: 1.15 (history)
First publication date: Jun 26, 2008 11:36 am +0000
Last revision to module: Mar 28, 2013 1:56 am +0000

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Version History

Version: 1.15 Mar 28, 2013 1:56 am +0000 by Susan Dean
Changes:
Module: Descriptive Statistics: Measuring the Spread of the Data: Added calculator instructions.

Version: 1.14 May 17, 2012 7:26 pm +0000 by Susan Dean
Changes:
Measuring the Spread of the Data: Added a note about "mean" and "average." Added subscripts of x to sample mean and population mean. Did other minor edits.

Version: 1.13 Mar 14, 2012 10:01 am +0000 by Susan Dean
Changes:
Module: Descriptive Statistics: Measuring the Spread of the Data: Updated "data is" to "data are."

Version: 1.12 Aug 19, 2011 9:33 am +0000 by Susan Dean
Changes:
Descriptive Statistics: Measuring the Spread of the Data: Updated glossary item "Standard Deviation."

Version: 1.11 Jul 8, 2011 4:12 pm +0000 by Susan Dean
Changes:
Descriptive Statistics: Measuring the Spread of the Data: Made various minor edits throughout the section.  Added Chebyshev's Rule and the Empirical Rule at the end.

Version: 1.10 Jun 22, 2011 11:00 am +0000 by Susan Dean
Changes:
Descriptive Statistics: Measuring the Spread of the Data: Added more information about the standard deviation and the variance and the equation #ofSTDEV=(value-mean)/stdev.

Version: 1.9 Mar 8, 2010 8:25 pm +0000 by Susan Dean
Changes:
 Descriptive Statistics: Measuring the Spread of the Data: Added Sampling Variability of a Statistic.

Version: 1.8 Feb 19, 2009 9:36 am +0000 by Susan Dean
Changes:
Descriptive Statistics: Measuring the Spread of the Data:  updated the glossary items.

Version: 1.7 Jan 8, 2009 9:35 pm +0000 by Susan Dean
Changes:
Descriptive Statistics:  Measuring the Spread of Data: Added the heading "Calculation of the Sample Standard Deviation" for clarity.

Version: 1.6 Oct 27, 2008 1:23 pm +0000 by James Cooper
Changes:
roles updated

Version: 1.5 Aug 20, 2008 11:15 am +0000 by Jonathan Emmons
Changes:
Corrected errors (see m17360 for details)

Version: 1.4 Jul 14, 2008 11:07 am +0000 by Connexions
Changes:
Removed image width parameters

Version: 1.3 Jul 8, 2008 8:28 pm +0000 by Connexions
Changes:
post review edits

Version: 1.2 Jul 3, 2008 11:27 am +0000 by Connexions
Changes:
post review updates

Version: 1.1 Jun 26, 2008 6:26 pm +0000 by Connexions
Changes:
Initial publication

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American Chemical Society (ACS) Style Guide:

Dean, S.; Illowsky, B. Descriptive Statistics: Measuring the Spread of the Data, OpenStax-CNX Web site. http://cnx.org/content/m17103/1.15/, Mar 27, 2013.

American Medical Assocation (AMA) Manual of Style:

Dean S, Illowsky B. Descriptive Statistics: Measuring the Spread of the Data [OpenStax-CNX Web site]. March 27, 2013. Available at: http://cnx.org/content/m17103/1.15/.

American Psychological Assocation (APA) Publication Manual:

Dean, S., & Illowsky, B. (2013, March 27). Descriptive Statistics: Measuring the Spread of the Data. Retrieved from the OpenStax-CNX Web site: http://cnx.org/content/m17103/1.15/

Chicago Manual of Style (Bibliography):

Dean, Susan, and Barbara Illowsky. "Descriptive Statistics: Measuring the Spread of the Data." OpenStax-CNX. March 27, 2013. http://cnx.org/content/m17103/1.15/.

Chicago Manual of Style (Note):

Susan Dean and Barbara Illowsky, "Descriptive Statistics: Measuring the Spread of the Data," OpenStax-CNX, March 27, 2013, http://cnx.org/content/m17103/1.15/.

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

Dean, S., & Illowsky, B. 2013. Descriptive Statistics: Measuring the Spread of the Data. OpenStax-CNX, March 27, 2013. http://cnx.org/content/m17103/1.15/.

Modern Languages Association (MLA) Style Manual:

Dean, Susan, and Barbara Illowsky. Descriptive Statistics: Measuring the Spread of the Data. OpenStax-CNX. 28 Mar. 2013 <http://cnx.org/content/m17103/1.15/>.