Table 2 Summary statistics of bond strength (Newton) for each group (A), two way ANOVA results (B) and post hoc analysis (C)
A) Statistics of bond strength | ||||
Group | Mean | Std. Deviation | Minimum | Maximum |
C1.5 | 241.5733 N | 12.99546 | 219.70 N | 262.10 N |
L1.5 | 242.3867 N | 12.46686 | 220.70 N | 262.10 N |
C1.0 | 240.9467 N | 12.86978 | 220.20 N | 262.70 N |
L1.0 | 238.5933 N | 10.97318 | 221.10 N | 260.10 N |
C0.5 | 222.9133 N | 6.41826 | 209.90 N | 230.70 N |
L0.5 | 221.2067 N | 7.34064 | 209.70 N | 232.70 N |
Control | 218.3267 N | 4.98691 | 209.60 N | 229.40 N |
Total | 232.2781 N | 14.15982 | 209.60 N | 262.70 N |
B) ANOVA table | ||||
Source | F statistics | Df1 | Df2 | P value |
Power | 12.038 | 2 | 99 | p < 0.001 |
Direction | 0.764 | 1 | 99 | 0.384 |
Interaction | 2.903 | 1 | 99 | 0.092 |
C) Post hoc analysis for Power | ||||
Group (I) | Group (J) | Mean Difference (I-J) | Standard Error | P value |
Power 0.5 W | Power 1.0 W | −11.990 | 2.836 | p < 0.001 |
Power 1.5 W | −13.794 | 3.563 | p< 0.001 | |
Control | 9.453 | 3.563 | 0.009 | |
Power 1.0 W | Power 1.5 W | −1.803 | 3.737 | 0.630 |
Control | 21.443 | 3.737 | p < 0.001 | |
Power 1.5 W | Control | 23.247 | 4.315 | p < 0.001 |