Regression Applet
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MERLOT II




        

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Regression Applet

        

Regression Applet

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The purpose of the applet is to allow students to see the effects of an outlier on a set of statistical data.  Students add a data point to an existing data plot and can move the data point anywhere on the data plot.  This allows students to see what the addition of an outlier does visually to the regression line for the data, how this changes the equation of the regression line, and how this changes the correlation coefficient relating the variables X and Y to each other. 
Material Type: Simulation
Date Added to MERLOT: November 09, 2006
Date Modified in MERLOT: February 17, 2013
Author:
Send email to west@stat.sc.edu
Submitter: James Klino

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About

Primary Audience: College General Ed, College Lower Division
Mobile Compatibility: Not specified at this time
Technical Requirements: The applet works for Explorer 6.0 and Netscape 7.1. Other versions of these web browsers may work, but the status of this has been untested.
Language: English
Cost Involved: no
Source Code Available: unsure
Accessiblity Information Available: unsure
Creative Commons: unsure
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Avatar for Robert Lockwood
2 years ago

Robert Lockwood (Faculty)

This is a good demonstration of what happens to the regression line when an outlier is added to the data set. I would like to see the option to add more than a single data point but that does not diminish the value of this in reinforcing the concept of regression and the impact of an outlier.

Time spent reviewing site: 10 minutes