$${\delta\left( X,Y \right) = \frac{\text{cov}\left( X,Y \right)}{s_{X}s_{Y}},\ gdzie\ S_{X} = \sqrt{\frac{1}{m}\sum_{j = 1}^{m}\left( X_{j} - \overset{\overline{}}{X} \right)^{2}}\text{\ dla\ m}\mathbb{\in N.}\backslash n\backslash n\backslash n}{F\left( x \right) = \left\{ \begin{matrix} \frac{\frac{7x}{x + 6} + 2arcsinhip(8x)}{\operatorname{}{(x - 2)}}\ dla\ x < - 6, \\ \int_{5}^{x}\frac{\sqrt[3]{x^{8} + 2}}{\operatorname{}\left( 5t - 2 \right)}\ dla - 6 \leq x < 4. \\ \end{matrix} \right.\ }$$