Pearson's Skewness Coefficients

Given a Distribution with measured Mean, Median, Mode, and Standard Deviation $s$, Pearson's first skewness coefficient is

$${3[{\rm mean}]-[{\rm mode}]\over s},$$

and the second coefficient is

$${3[{\rm mean}]-[{\rm median}]\over s}.$$

See also Fisher Skewness, Pearson Skewness, Skewness