Dataset: roughness_msa.csv Source: R.S. Peruchi, A.P. Paiva, P.P. Balestrassi, J.R. Ferreira, R. Sawhney (2014). "Weighted Approch for Multivariate Analysis of Variance in Measurement System Analysis," Precision Engineering, Vol. 38, pp. 651-658. Description: Results of an experiment measuring various aspects of roughness from a turning process among 12 parts by 3 operators over 3 replicates. R_a = average roughness R_y = maximum " R_z = ten point height R_q = root mean square R_t = maximum peak to valley Variable Names: part operator replicate R_a R_y R_z R_q R_t