I Round your answers to 4 dedmal' places A large firm wants to determine whether the service it provides to high income customers differs from the service it provides to lower income customers. A sample of 500 customers is selected and each customer is asked to fill a questionnaire which includes among other things, the income level of the customer and the performance rating of the service company. The following results are tabulated below Table 1. Contingency table of the company's performance rating classified according to customers\" income level. Customers' Income Level Performance Rating Total Low Middle High Outstanding 50 55 :12 15? Average 96 120 48 254 Poor 29 35 15 Total 175 220 105 Determine whether the service that the firm provides to high income customers differs from the service it provides to lower income customers. Use 0.05 level of significance. a. H0: H3: b. Test: c. Decision Rule level ofsignificance: critical value: d. Computation e. Decision f. Conclusion