The monthly incomes from a random sample of faculty at a university are shown below.
| Monthly Income ($1000s) |
| 3.0 |
| 4.0 |
| 6.0 |
| 3.0 |
| 5.0 |
| 5.0 |
| 6.0 |
| 8.0 |
Using a T-Test, Compute a 90% confidence interval for the mean of the population. The population of all faculty incomes is known to be normally distributed. Give your answer in dollars.
