Research Article

Graphical Evaluation of the Ridge-Type Robust Regression Estimators in Mixture Experiments

Table 2

Statistics for detecting influential observations for the Hald cement data.

IDCook’s DistanceDFITS

178.578.532−0.032−0.020−0.0190.4890.000−0.018
274.372.7031.5960.8560.8400.2860.0590.533
3104.3104.495−0.195−0.863−0.8480.98914.074−8.240
487.689.487−1.887−0.979−0.9760.2360.059−0.543
595.995.7210.1780.1010.0950.3620.0010.071
6109.2106.4032.7961.3701.4650.1440.0630.603
7102.7104.108−1.408−0.835−0.8170.4150.099−0.689
872.575.722−3.222−1.845−2.2770.3730.406−1.758
993.192.0491.0500.5300.5050.1950.0130.249
10115.9115.7770.1220.1010.0940.6990.0040.144
1183.881.4302.3691.3421.4260.3590.2021.069
12113.3112.4170.8820.4460.4220.1970.0090.209
13109.4111.649−2.249−1.176−1.2100.2490.092−0.697