| Product/Statistic | Control | 10% Replacement | 20% Replacement | 30% Replacement |
| Mean | 7.90a | 7.57b | 7.13c | 6.40d |
| Standard Deviation | 1.45 | 1.04 | 1.11 | 1.73 |
| Median | 8.00 | 8.00 | 7.00 | 7.00 |
| Minimum | 4.00 | 6.00 | 5.00 | 2.00 |
| Maximum | 9.00 | 9.00 | 9.00 | 9.00 |