Wildlife biologists are attempting to track the prevalence of rabies in Texas coyota populations. They trap and test coyotes in three widely separated counties to determine whether the prevalence, the proportion having rabies, is the same.
| Kerr | Neuces | Crockett |
| rabid |
22 |
15 |
12 |
| not rabid |
28 |
36 |
20 |
What is the chi-square statistic for the test comparing these proportions, and what is the critical value for the test of equal proportios at the alpha = 0.05 level?
The answer is "2.32, 5.99" but i need help getting there