| Statistics | GLASOD | Field data |
| No. of field observation sites | 7 | 7 |
| Average | 2.4 | 2.3 |
| Standard error | 0.4 | 0.4 |
| Standard deviation | 1.1 | 1.1 |
| Sample variance | 1.3 | 1.2 |
| Minimum | 1.0 | 1.0 |
| Maximum | 4.0 | 4.0 |
| Sum | 17 | 16 |
| Confidence level (95%) | 1.05 | 1.03 |
| R2 (Coefficient of Determination) | 07 | |
| Adjusted R2 | 0.6 | |
| t0.05(table) | 2.571 | |
| tcomputed | 3.416 | |