Chapter 8
Correlation

 I. Scatter Plots.....(A worked problem)

II.  The Covariance. . . . COV_XY

            A.  The Deviation Formula

            B.  The Computational Formula

            C.  Visual Summary:  Computing the Covariance

II. Correlation Coefficient. . . . r_XY

  A. The Covariance Formula

 

 

  B. Visual Summary:  Computing the Correlation Coefficient using the Covariance

  C.  The Computational Formula....(A worked problem)

 

 

  III. The Coefficient of Determination. . . .

  IV. The Significance of r

A. df = n-2

B. Use Table R to find the Critical Value of r

C. If the absolute value of r is > or = the Critical value r is significant

Copyright © 2004 by Mark W. Vernoy