[m]\overline{x}=\frac{3,7+5,6+7,3+10,2+13,3+14,5+15,8}{7}=\frac{70,4}{7}[/m]
[m]\overline{y}=\frac{18,5+17,2+14,3+10,7+10,9+7,2+6,7}{7}=\frac{85,5}{7}[/m]
[m] σ_{x}=\sqrt{(3,7-\frac{70,4}{7})^2+(5,6-\frac{70,4}{7})^2+(7,3-\frac{70,4}{7})^2+(10,2-\frac{70,4}{7})^2+(13,3-\frac{70,4}{7})^2+(14,5-\frac{70,4}{7})^2}=[/m]
[m] σ_{x}=\sqrt{(18,5-\frac{85,5}{7})^2+(17,2-\frac{85,5}{7})^2+(14,3-\frac{85,5}{7})^2+(10,7-\frac{85,5}{7})^2+(10,9-\frac{85,5}{7})^2+(7,2-\frac{85,5}{7})^2+(6,7-\frac{85,5}{7})}=[/m]
[m]r=\frac{(3,7-\frac{70,4}{7})(18,5-\frac{85,5}{7})+(5,6-\frac{70,4}{7})(17,2-\frac{85,5}{7})+(7,3-\frac{70,4}{7})(14,3-\frac{85,5}{7})+(10,2-\frac{70,4}{7})(10,7-\frac{85,5}{7})+(13,3-\frac{70,4}{7})(10,9-\frac{85,5}{7})+(14,5-\frac{70,4}{7})(7,2-\frac{85,5}{7})+(15,8-\frac{70,4}{7})(6,7-\frac{85,5}{7})}{ σ_{X}\cdot σ_{Y} }[/m]
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