RMSE

α

β

t_α

t_β

p_α

p_β

OLS

6.9320

0.0239

1.1787

0.1189

5.1476

0.9060

0.0000

Huber

7.0614

−0.0364

0.9628

−0.2291

5.3178

0.8201

0.0000

Bisquare

7.1912

−0.0651

0.8740

−0.4216

4.9622

0.6758z

0.0000

Fuzzy

6.9701

−0.0246

1.0742