a

b

Mean

Variance

Skewness

Kurtosis

2

2

0.6317

0.1181

0.7243

3.4075

4

0.4194

0.0552

0.7997

3.5772

6

0.3332

0.0354

0.8323

3.6061

4

2

0.7633

0.0491

-0.0176

2.7721

4

0.6208

0.0340

0.0499

2.7321

6

0.553

0.0274

0.0542

2.7683

6

2

0.8269

0.0272

-0.2830

2.8744

4

0.7201

0.0217

-0.2462

2.9761

6

0.6666

0.0187

-0.1926

2.5345