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Consider the following contingency table of observed frequencies. Complete parts a. through e. below.
a. Identify the null and alternative hypotheses for a chi-square test of independence based on the information in the table. This test will have a significance level of alpha = 0.025. Choose the correct answer
| C1 | C2 | C3 | |
| R1 | 21 | 7 | 20 |
| R2 | 6 | 6 | 11 |
| R3 | 12 | 16 | 5 |