An Applet for the Investigation of Simpson's Paradox

This article describes an applet that facilitates investigation of Simpson’s Paradox in the context
of a number of real and hypothetical data sets. The applet builds on the Baker-Kramer graphical
representation for Simpson’s Paradox. The implementation and use of the applet are explained.
This is followed by a description of how the applet has been used in an introductory statistics
class and a discussion of student responses to the applet.