For Exercises 3–5, assume that the ANOVA assumptions are met and perform the appropriate analysis of variance using .
customersatisfy
4. Customer Satisfaction. The district sales manager of a local chain store wants to determine whether significant differences exist in the mean customer satisfaction among the four franchise stores in her district. Customer satisfaction data were gathered over seven days at each of the four stores. The resulting data are summarized in Table 13.
| Store A | Store B | Store C | Store D |
|---|---|---|---|
| 50 | 60 | 25 | 75 |
| 40 | 45 | 30 | 60 |
| 60 | 70 | 50 | 80 |
| 60 | 70 | 30 | 90 |
| 50 | 60 | 40 | 70 |
| 45 | 65 | 25 | 85 |
| 55 | 70 | 45 | 95 |