The data below are the temperatures on randomly chosen days during the summer and the number of employee absences at a local company on those days. What is the 95% confidence interval about the slope of the true least-squares regression line, for the data given below?
| Temperature (x) | Number of absences (y) |
|---|
| 72 | 3 |
| 85 | 7 |
| 91 | 10 |
| 90 | 10 |
| 88 | 8 |
| 98 | 15 |
| 75 | 4 |
| 100 | 15 |
| 80 | 5 |