highly significantp = 0.009
For the 6% B 4 C composite, feed rate remains highly significant (F = 15.72, p = 0.009), contributing over 46% to surface roughness variation.
For the 6% B 4 C composite, feed rate remains highly significant (F = 15.72, p = 0.009), contributing over 46% to surface roughness variation.
Spindle speed again shows marginal significance ( p ≈ 0.05), suggesting its secondary role in controlling surface quality.