Interactive Demonstrations for Statistics Education on the World Wide Web

R. Webster West and R. Todd Ogden
University of South Carolina

Journal of Statistics Education v.6, n.3 (1998)

Copyright (c) 1998 by R. Webster West and R. Todd Ogden, all rights reserved. This text may be freely shared among individuals, but it may not be republished in any medium without express written consent from the authors and advance notification of the editor.

Regression Applet

The applet below is designed to teach students the effect of leverage points on a regression line. Students may add points to the plot by clicking the mouse button. Students should note that adding points close to the existing line barely changes the line. When points are added far from the existing line, the regression line can change considerably. This is particularly true for points added outside the range of the data. This should help students understand the effect of outliers on regression analysis.

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