Regression >> Illustrate how correlation and/or regression statistics are affected by points, outliers, range of X

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APPLETSOURCEDESCRIPTION
Line of Best FitNational Council of Teachers of Mathematics, IlluminationsUsers can place points on a scatterplot and guess at the best fit line before showing actual regression line and correlation, can also move or delete points.  more
Correlation & Regression/ WISE Regression AppletWISE (Web Interface for Statistics Education)Shows changes in the regression line, errors, squared errors, r squared, and ANOVA table as users move points on a scatterplot.  more
Put Pointsistics.net, (Marden)Shows effects on the correlation, regression line and residuals as user adds or erases points.  more
Regression AppletWestShows effects on regression line as users place an additional point on a scatterplot.  more
Simple Best Fit LineWolfram Demonstrations ProjectShows effects on regression line as users move or omit one of six points on a scatterplot. Requires download of Mathematica Player as well as demo itself, good for classroom demonstration.  more
Simple Linear RegressionInteractive Business Statistics (Lind, Marchal, Wathen)Users drag points on a scatterplot for one of two sample data sets as calculations of predictions, residuals and regression line are instantly updated.  more
LeverageDept of Statistics, Texas A&M UniversityShows effects on regression line as users adjust location of two points (one with moderate X and one that is outlier in the X direction) to extreme values.  more
Influential ObservationsSeeing Statistics (McClelland) in Fundamental Statistics for the Behavioral Sciences (Howell)Shows effects on regression line and correlation as users delete points.  more