| 3 |
|
|
正常 |
非正常 |
合计 |
|
男 |
30 |
|
|
|
女 |
|
10 |
|
|
合计 |
|
|
110 |
|
P(K2≥k0) |
0.100 |
0.05 |
0.025 |
0.010 |
0.001 |
|
k0 |
2.706 |
3.841 |
5.024 |
6.635 |
10.828 |
| n |
| ( |
| a |
| d |
| − |
| b |
| c |
| ) |
| 2 |
| ( |
| a |
| + |
| b |
| ) |
| ( |
| c |
| + |
| d |
| ) |
| ( |
| a |
| + |
| c |
| ) |
| ( |
| b |
| + |
| d |
| ) |
| 正常 | 非正常 | 合计 | |