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Mean values and standard deviation of peak load of all the samples
| Sample | Zirconia–ceramic crowns (kN) | Metal–ceramic crowns (kN) | IPS-empress crown (kN) |
|---|---|---|---|
| 1 | 3.040 | 4.023 | 1.593 |
| 2 | 4.475 | 3.403 | 2.080 |
| 3 | 2.198 | 3.413 | 1.378 |
| 4 | 4.690 | 3.100 | 1.350 |
| 5 | 9.368 | 3.270 | 0.730 |
| 6 | 4.648 | 2.445 | 2.265 |
| Mean | 4.7365 | 3.2757 | 1.566 |
| SD | 2.2676 | 0.4681 | 0.5057 |
| F value | 6.72 | ||
