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Tool: Correlation / Regression
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Description: Correlation and Regression offers a series of linked workspaces in which the student can enter data directly into a gridded scatterplot complete with user controlled scaling of the X and Y axes. Points placed on the scatterplot are automatically entered into a deviation-score summary table (separate applet) and values from the summary table are passed to a formulas applet that displays computations for means, standard deviations, covariance, correlation, slope, and intercept values. (Only the initial screen is illustrated here.) Students can observe how values are computed and can request more detailed information about the interpretation and computation of those values (i.e., mean, standard deviation, etc.). Any changes made in the summary table are reflected in the dynamic updating of the scatterplot and formula applets. Data can be imported or exported into the summary table and the scatterplot can be printed.
Technology Type: Java Applet 
Author: Bob Hall and Arlen Strader
Language: English 
Cost: Does not require payment for use

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Tool: Interpreting Correlation Coefficients
Courses: Probability & Statistics Displaying with Graphs, Scatterplots, Correlation & Regression

Student Review (Not based on classroom experience)
Reviewer: Deatra, Dec 6 2005 07:28:12:477PM
Appropriate for: practice of skills and understandings, applications of a concept or technique
Ability to meet my goals: Very Effective
Recommended for: Probability & Statistics: Data and Distributions
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