RMSE

α

β

tα

tβ

pα

pβ

OLS

8.1313

−0.1970

0.8917

−0.8364

3.3198

0.4084

0.0000

Huber

8.2699

−0.3976

1.1532

−2.2717

5.7773

0.0292

0.0000

Bisquare

8.4083

−0.4299

1.2958

−2.4561

6.4922

0.0190

0.0000

Fuzzy

8.1438

−0.2747

0.9121