Open Access

Table 7.

ANOM results for electrode wear ratio.

Mean by factor level (dB)
Degree of freedom (DoF) Sum of square (SS) Mean square (V) Value of F calculated Contribution percentage P%
1 2 3
X1: wt.%CNT
23.955 14.871 10.905 2 9.94 4.97 20.7 61.1
X2: Discharge current
18.969 15.805 14.957 2 0.99 0.49 2.04 6.1
X3: Voltage [pooled factor]
16.477 17.349 15.905 2 0.11
X4: Machining on time [pooled factor]
18.551 14.960 16.221 2 0.73
X5: Depth of cut [pooled factor]
17.685 15.411 16.635 2 0.28
X1.X2: Interaction factor
14.608 18.56 16.560 4 0.868 0.217 0.875 5.4
X1·X3: Interaction factor [pooled factor]
16.788 17.64 15.296 4 0.31
X1·X4: Interaction factor [pooled factor]
17.876 15.46 16.386 4 0.32
X1·X5: Interaction factor [pooled factor]
17.559 16.55 15.616 4 0.20
Error 18 4.47 0.24 27.4
Total 26 16.27 100

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