数量守恒

长度守恒

总体守恒

男(N = 20)

5.600 ± 4.070

3.950 ± 2.523

9.550 ± 5.830

女(N = 15)

5.270 ± 4.758

3.070 ± 2.712

8.330 ± 6.250

t

0.223

0.993

0.593