An Automobile Repair Service Asks 170 Customers with Annual Incomes $\$ 20,000$

Essay

An automobile repair service asks 170 customers with annual incomes under \$20,000, 180 customers with annual incomes from $\$ 20,000$ to $\$ 50,000$ and 150 customers with annual incomes over $\$ 50,000$ whether they rated the repair service as outstanding, above average, average, below average, or poor. What hypotheses do we want to test if we are going to perform a chi-square analysis of the resulting $5 \times 3$ table?