For Exercises 3–8, use the data provided to construct a 95% confidence interval for the mean value of for the given value of . The regression equation is provided; assume the regression assumptions are met.
3.
| 1 | 15 |
| 2 | 20 |
| 3 | 20 |
| 4 | 25 |
| 5 | 25 |
13.2.3
Lower bound: 18.7500 (Minitab: 18.7497); Upper bound: 23.5000 (Minitab: 23.2500)