Question: Web-based exercise. The best way to grasp how the correlation reflects the pattern of the points on a scatterplot is to use an applet that

Web-based exercise. The best way to grasp how the correlation reflects the pattern of the points on a scatterplot is to use an “applet”

that allows you to plot and move data points and watch the correlation change. Go to the Statistics: Concepts and Controversies Web site, www

.whfreeman.com/scc7e, and look at the Correlation and Regression applet.

The correlation is constantly recalculated as you click to add points or use your mouse to move points. Create a plot with a correlation near 1 and then add a point to make the correlation negative. Where did you add the point?

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