Using Regressions

While regressions mirror correlation coefficients and covariances in showing the strength of the relationship between two variables, they also serve another useful purpose. The regression equation described in the last section can be used to estimate predicted values for the dependent variable, based upon assumed or actual values for the independent variable. In other words, for any given Y, we can estimate what X should be:

How good are these predictions? That will depend entirely upon the strength of the relationship measured in

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