# Regression and correlation coefficient

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• June 21st 2012, 02:02 AM
carmenritu
Regression and correlation coefficient
Hello
I need to fit experimental data to mathematical models. The data fitted to these models had correlation (R) and regresion (R2) coefficients. What coefficient (R or R2) can i used to know which it is the best model?
Thanks!!
• June 21st 2012, 07:37 AM
richard1234
Re: Regression and correlation coefficient
Either. Given $R$, you can find $R^2$, and vice versa (given that you know whether the slope is positive or negative).