分组

n

达标

未达标

A组

60

19 (31.67%)

41 (68.33%)

B组

60

43 (71.67%)

17 (28.33%)

C组

60

56 (93.33%)

4 (6.67%)

c²

52.012

p

<0.001

P_A:B (c², p)

19.221, <0.001

P_A:C (c², p)

48.676, <0.001

P_B:C (c², p)

9.755, 0.002