District/Comparison

N

K (cm)

T (cm)

φ

Yunnan of China

1540

37.53 ± 0.49

15.67 ± 0.26

0.58 ± 0.05

Guangxi of China

1540

35.27 ± 0.33

13.62 ± 0.28

0.51 ± 0.02

T

-

18.9852

35.42

6.83

P

-

0.00136

0.000728

0.00378