| Chi-Squared |
probability
of chance occurance |
| 12.120 | 0.0005 |
| 10.830 | 0.001 |
| 7.879 | 0.005 |
| 6.635 | 0.010 |
| 5.412 | 0.020 |
| 5.024 | 0.025 |
| 3.841 | 0.050 |
| 3.170 | 0.075 |
| 2.706 | 0.100 |
| 2.072 | 0.150 |
| 1.642 | 0.200 |
| 1.074 | 0.300 |
| 0.708 | 0.400 |
| 0.455 | 0.500 |
| 0.275 | 0.600 |
| 0.148 | 0.700 |
| 0.064 | 0.800 |
| 0.036 | 0.850 |
| 0.016 | 0.900 |
| 0.009 | 0.925 |
| 0.004 | 0.950 |
| 0.001 | 0.975 |