不关注 | 关注 | 总计 | |
男生 | 30 | 15 | 45 |
女生 | 45 | 10 | 55 |
总计 | 75 | 25 | 100 |
n |
a |
d |
− |
b |
c |
2 |
( |
a |
+ |
b |
) |
( |
c |
+ |
d |
) |
( |
a |
+ |
c |
) |
( |
b |
+ |
d |
) |
P(K2>k0) | 0.50 | 0.40 | 0.25 | 0.15 | 0.10 | 0.05 | 0.025 | 0.010 | 0.005 | 0.001 |
k0 | 0.455 | 0.708 | 1.323 | 2.072 | 2.706 | 3.84 | 5.024 | 6.635 | 7.879 | 10.83 |
A:0.10
B:0.05
C:0.025
D:0.01