Research Article

Modified Robust Ridge M-Estimators in Two-Parameter Ridge Regression Model

Table 22

Estimated MSE and the regression coefficients for water quality data.

EstimatorsMSE

OLS0.0908340.29440.16450.11110.4784
HK0.0698480.54680.03530.15250.1338
M0.0335520.48830.09660.08750.3723
MRE0.0257850.48780.09620.07630.3136
M10.1541910.4880.09530.03080.1098
TRME10.2172820.48710.09260.01830.0635
TRME20.0302360.53860.10170.03370.1221
MTPM10.0542690.5530.00860.00140.001
MTPM20.0513230.56090.02150.00630.0045
MTPM30.0226280.58630.03740.11970.099
MTPM40.0431410.52330.08930.01290.0448
MTPM50.0541050.55360.00960.00160.0012
MTPM60.0528740.55680.01520.00320.0023