| Product/Statistic | Control | 10% Replacement | 20% Replacement | 30% Replacement |
| Mean | 7.13a | 7.63a | 7.20b | 6.83c |
| Standard Deviation | 1.76 | 1.45 | 1.30 | 1.78 |
| Median | 7.00 | 8.00 | 7.00 | 7.00 |
| Minimum | 3.00 | 4.00 | 4.00 | 3.00 |
| Maximum | 9.00 | 9.00 | 9.00 | 9.00 |