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Internet Exercises
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1

Economic Penalty of Extra Pounds to Middle-Aged Women

http://www.umich.edu/~newsinfo/Releases/2000/Nov00/r111700c.html

This is a news release from the University of Michigan describing the findings from a new study. Review this news release and determine if this was experimental or nonexperimental study and explain how this study relates to the third variable problem discussed in the text.
2

Guess the Correlation Coefficients

http://www.stat.uiuc.edu/~stat100/java/guess/GCApplet.html

This is a guessing game that will give you practice identifying differences in data patterns that correspond to correlation coefficients. Click on the "new plots" button and then match the coefficients shown to the matching scatterplot. After making your four selections, click on the "answers" button. How did you do?





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