DylsexicChciken Posted December 18, 2014 Share Posted December 18, 2014 (edited) For the topic of linear regression, my book says that the (coefficient of determination) = (correlation coefficient squared). But it doesn't explain why. So why is on equal to the square of the other when their formulas look completely different? Edited December 18, 2014 by DylsexicChciken Link to comment Share on other sites More sharing options...
studiot Posted December 19, 2014 Share Posted December 19, 2014 If you substitute the equation of the linear regression line into the defining formula for the coefficient of determination and play with the algebra for about a page you arrive at the definition formula for the coefficient of correlation. 1 Link to comment Share on other sites More sharing options...
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