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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