Research Article

The Use of Generalized Means in the Estimation of the Weibull Tail Coefficient

Table 1

Simulated optimal sample fraction (OSF), , mean value, and RMSE (both computed at the optimal level) of for , , , 0, and , , and from underlying parents ().

100200500100020005000

OSF
0.44000.31000.31800.40100.37700.3640
0.45000.41000.37600.41900.35450.1760
0.45000.38000.27800.17200.10600.0560
0.11000.09000.04600.03200.02400.0128
0.09000.06000.03600.02400.01800.0092
0.51000.52000.53800.49500.49100.5282
0.68000.73000.66000.69700.68850.7168
1.41611.10020.99920.97250.95950.9534
1.09090.98810.94090.92430.91850.9210
0.91780.88090.86680.87490.88050.8883
0.75690.76410.79670.81110.81980.8386
0.70640.73690.76840.78930.80110.8252
1.02931.01461.00601.00301.00131.0005
1.01341.00741.00261.00111.00021.0001
RMSE
1.70970.53130.24840.16530.11780.0831
0.58420.30740.18150.13900.11510.0981
0.31130.22580.17970.15870.14460.1295
0.31240.28170.24880.22620.20760.1860
0.34210.31000.27250.24740.22670.2023
0.21300.14640.09080.06430.04540.0286
0.12310.08600.05410.03820.02700.0170