moments of a sinusoidal distribution calculated expected Mean : 1.5708 1.5708 Average Deviation : 0.5704 0.5708 Standard Deviation : 0.6833 0.6837 Variance : 0.4669 0.4674 Skewness : 0.0000 0.0000 Kurtosis : -0.8089 -0.8062