Is regression useful? In Exercise 4.37 (page 113) you used the Correlation
Chapter 0, Problem 5.54(choose chapter or problem)
Is regression useful? In Exercise 4.37 (page 113) you used the Correlation andAPPLETRegression applet to create three scatterplots having correlation about r = 0.7between the horizontal variable x and the vertical variable y. Create three similarscatterplots again, and click the Show least-squares line box to display theregression lines. Correlation r = 0.7 is considered reasonably strong in manyareas of work. Because there is a reasonably strong correlation, we might use aregression line to predict y from x. In which of your three scatterplots does itmake sense to use a straight line for prediction?
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