Table 3.

Descriptive Statistics of all classes.

Variable	Mean	St. Dev.	Variance	Min	Median	Max	Range	Skewness	Kurtosis
S1	0.78815	0.04481	0.00201	0.65000	0.80203	0.83219	0.18219	-1.24	0.85
S2	0.72021	0.24955	0.06227	0.15000	0.74967	1.17284	1.02284	-0.35	-0.61
I	0.35246	0.16313	0.02661	0.15000	0.31232	0.71501	0.56501	0.59	-0.86
T	0.16826	0.07864	0.00618	0.02632	0.15830	0.35000	0.32368	0.38	-0.58
R	0.32684	0.18550	0.03441	0.10000	0.24670	0.87314	0.77314	1.27	0.66