R-Squared

What is R-Squared?

The R-Squared $(R^{2})$ of a regression is an indicator of how well the model explains variation in data. We have observations ${y_{i}}$ with mean $μ_{y}$ and the predictions of our model ${\hat{y_{i}}}$ .

R^{2} = \frac{e x p l a i n e d s u m o f s q u a r e s (E S S)}{t o t a l s u m o f s q u a r e s (T S S)}

$R - S q u a r e d N e a r O n e$

$R - S q u a r e d N e a r Z e r o$