Leverage
This applet illustrates leverage. There are two slider
bars which allow changing the response. With the slider bars
the user may create outliers in the response. Note how the right
hand slider corresponds to an observation that is also an outlier
in the X-direction. This point has higher leverage. You should be able
to see the effect in the two diagnostic plots.
A point corresponding to an outlying independent observation
has a stronger effect on the fitted regression parameters.
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