math correlation coefficient for this data se

Question

You generate a scatter plot using Excel. You then have Excel plot the trend line and report the equation and the $r^{2}$ value.

The regression equation is reported as y=-39.07x+70.92

and the $r^{2} = 0.4096$ .

What is the correlation coefficient for this data set?

r =

Philip P. · Accepted Answer

In stats, R is the correlation coefficient and R2 is the coefficient of determination.  Mathematically, R is simply the square root of R2:R = √(R2)

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