| Treatment | Mean | Std. Deviation | Std. Error |
| 1.00 | 1.64 | 0.15 | 0.04 |
| 2.00 | 1.68 | 0.12 | 0.03 |
| 3.00 | 1.67 | 0.19 | 0.03 |
| 4.00 | 1.62 | 0.20 | 0.05 |
| 5.00 | 1.58 | 0.45 | 0.12 |