Dataset: machining.dat Source: S.H. Yeo, M. Rahman, Y.S. Wong (1989). "Towards Enhancement of Machinability Data by Multiple Regression," Journal of Mechanical Working Technology, Vol. 19, pp. 85-99. Description: Experimental Results of a Turning operation, relating Tool Life (minutes) and Surface Roughness (mu_m) to 3 Factors: Speed (m/min), Feed Rate (mm/rev), Depth of Cut (mm) Due to model theory, all variables are transformed to logs in model fit. Variables/Columns Run # 7-8 Speed 10-16 Feed Rate 18-24 Depth of Cut 26-32 Tool Life 34-40 Surface Roughness 42-48