Correlation is not resistant. Go to the Correlation and Regression applet. ClickAPPLETon

Chapter 0, Problem 4.36

(choose chapter or problem)

Correlation is not resistant. Go to the Correlation and Regression applet. ClickAPPLETon the scatterplot to create a group of 10 points in the lower-left corner of thescatterplot with a strong straight-line pattern (correlation about 0.9).(a) Add one point at the upper right that is in line with the first 10. How doesthe correlation change?(b) Drag this last point down until it is opposite the group of 10 points. Howsmall can you make the correlation? Can you make the correlation negative? Yousee that a single outlier can greatly strengthen or weaken a correlation. Alwaysplot your data to check for outlying points.

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