The following paired samples have been obtained from normally distributed populations. Construct a 90% confidence interval estimate for the mean paired difference between the two population means.
| Sample # |
Population 1 |
Population 2 |
| 1 |
3,693 |
4,635 |
| 2 |
3,679 |
4,262 |
| 3 |
3,921 |
4,293 |
| 4 |
4,106 |
4,197 |
| 5 |
3,808 |
4,536 |
| 6 |
4,394 |
4,494 |
| 7 |
3,878 |
4,094
|