User:Iwat/sandbox


 * $$ \sum_{i=1}^{n}({y_{i} - \hat y_{i}})^2 $$
 * $$ b_1 = \frac{S_{xy}}{S^2_x} $$
 * $$ b_0 = \bar y - b_1 \bar x $$
 * $$ r = \frac{s_{xy}}{s_x s_y} $$
 * $$ \rho = \frac{\sigma_{xy}}{\sigma_x \sigma_y} $$