N

Min

Max

Range

Mean

Var

Std

CV(%)

251-10

50

16.7

23.24

6.54

19.82789

1.563093

1.250237

6.305447

251-12

50

15.48

25.41

9.93

19.33091

5.158352

2.271201

11.74906

251-14

50

5.84

26.7

20.86

19.865

9.817665

3.133315

15.77304

251-16

50

15.55

33.35

17.8

20.53787

8.321517

2.884704

14.04578

251-18

50

14.69

22.96

8.27

19.06429

2.506779

1.583281

8.305083