|
| Conditioned |
| |
|
| Yes = +1 | No = +0 | Total |
Condition | Yes = +1 | a | b = 0 | (a + b) |
No = +0 | c = 0 | d | (c + d) | |
| Total | (a + c) | (b + d) | (a + b + c + d) |