Table 11 Estimated regression coefficients for TWR using a graphite 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 | 0.012650 | 0.001084 | 11.671 | 0.000* | Significant |
I | 0.011931 | 0.000664 | 17.975 | 0.000* | Significant |
TON | − 0.000800 | 0.000664 | − 1.205 | 0.282 | Non-Significant |
TOFF | − 0.002231 | 0.000664 | − 3.362 | 0.020* | Significant |
TON *I | 0.002531 | 0.000977 | 2.591 | 0.049* | Significant |
TON* TON | 0.000694 | 0.000977 | 0.710 | 0.509 | Non-Significant |
TOFF*TOFF | 0.001381 | 0.000977 | 1.414 | 0.217 | Non-Significant |
I* TON | 0.000400 | 0.000939 | 0.426 | 0.688 | Non-Significant |
I*TOFF | − 0.001438 | 0.000939 | − 1.531 | 0.186 | Non-Significant |
TON*TOFF | 0.001975 | 0.000939 | 2.104 | 0.089* | Significant |
R-Sq = 98.60% R-Sq(pred) = 77.81% R-Sq(adj) = 96.07%. | |||||
