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Table 4.

Analysis of Variance (ANOVA) for the kerf tapera.

Source Seq. SS Df Adj. MS Fcalculated P (%)
Power (X1) 500.924 2 250.462 74.883 79.86
Pressure (X2) 72.784 2 36.392 10.880 11.61
Frequency (X3) 7.797* 2
Cutting speed (X4) 15.048* 2
X1 · X2 0.897* 4
X1 · X3 4.121* 4
X1 · X4 5.286* 4
Error 53.516 16 3.3447 8.53
Total 627.224 26 100
a

Df: degrees of freedom; SS: sum of squares; MS: Variance; P: percent contribution.

*

Pooled, Tabulated F-ratio at 99% confidence level: F0.01,2,16 = 6.23.

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