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Calculations of AB0/Rhesus independence.
| Blood group antigen | Rhesus antigen | All | |
|---|---|---|---|
| Negative | Positive | ||
| 0 | |||
| obs. pts. | 5 | 38 | 43 |
| exp. pts. | 9.1 | 33.9 | |
| A | |||
| obs. pts. | 21 | 73 | 94 |
| exp. pts. | 19.8 | 74.2 | |
| B | |||
| obs. pts. | 5 | 11 | 16 |
| exp. pts. | 3.4 | 12.6 | |
| AB | |||
| obs. pts. | 4 | 9 | 13 |
| exp. pts. | 2.7 | 10.3 | |
| All | |||
| obs. pts. | 35 | 131 | 166 |
| exp. pts. | |||
Rhesus/AB0-proportions are independent (Chi2 4.13, df 3, p = 0.248).
