Table 5 Estimated regression coefficients for MRR copper tool.
From: Comparative analysis of copper and graphite electrodes in EDM of Al–SiC metal matrix composites
Term | Coef | SE Coef | T | P | Remarks |
|---|---|---|---|---|---|
Constant | 0.129000 | 0.003268 | 39.476 | 0.000* | Significant |
I | 0.070638 | 0.002001 | 35.299 | 0.000* | Significant |
TON | 0.006250 | 0.002001 | 3.123 | 0.026* | Significant |
TOFF | 0.000862 | 0.002001 | 0.431 | 0.684 | Non-Significant |
I*I | 0.004825 | 0.002946 | 1.638 | 0.162 | Non-Significant |
TON * TON | − 0.014700 | 0.002946 | − 4.991 | 0.004* | Significant |
TOFF*TOFF | − 0.000675 | 0.002946 | − 0.229 | 0.828 | Non-Significant |
I* TON | − 0.004375 | 0.002830 | − 1.546 | 0.183 | Non-Significant |
I*TOFF | 0.000600 | 0.002830 | 0.212 | 0.840 | Non-Significant |
TON*TOFF | − 0.002125 | 0.002830 | − 0.751 | 0.487 | Non-Significant |
R-Sq = 99.61% R-Sq(pred) = 95.87% R-Sq(adj) = 98.92%. | |||||
