Table 3A: Comparison of mean surface roughness and standard deviation when composite resins subjected to Shofu polishing system
| Subgroups | N | Mean | S.D. | Std. error | Min value | Max value | |||||||
| IA | 10 | 0.0799 | 0.005664 | 0.001792 | 0.0710 | 0.0892 | |||||||
| IB | 10 | 0.1361 | 0.002148 | 0.0006791 | 0.1321 | 0.1395 | |||||||
| IC | 10 | 0.1970 | 0.001606 | 0.0005079 | 0.1952 | 0.1995 |