Research Article

Efficiency Comparison of New Adjusted Nonparametric and Parametric Statistics Interval Estimation Methods in the Simple Linear Regression Model

Table 4

The average width of the confidence interval for an independent variable has a scale-contaminated normal distribution with mean of 1 and variance of 1 and an error has a normal distribution with mean of 0 and variance of 1, 4, 9, 16, 25, 36, 49, 64, 81, and 100; sample sizes are 10, 30, 50, 70, 100, and 200.

nVarianceAverage width of confidence interval
LSBSJKTOTATSSLSBSJKTOTATSS

1010.203
40.402
93.617
160.803
251.004
361.204
491.408
641.610
811.811
1002.013
3010.1690.176
40.3320.3510.340
90.5060.5220.516
160.6730.6880.704
250.8400.8550.900
361.0051.0231.099
491.1321.204
641.3321.390
811.4931.579
1001.5521.770
5010.1030.107
40.2050.214
90.3080.321
160.4100.4270.462
250.5130.5240.592
360.6150.724
493.8990.7170.855
640.8180.993
810.9191.121
1001.0191.249
7010.0880.0890.0880.090
40.1760.1810.1770.189
90.2640.2650.2650.293
160.3520.3530.3540.398
250.4390.4430.4420.509
360.5270.5300.5300.617
490.6150.6180.619
643.9380.7020.7060.707
814.1770.8020.795
1000.8750.8840.884
10010.0680.069
40.137
90.214
160.292
250.374
360.459
490.542
640.628
810.715
1003.780
20010.0620.0620.0620.062
40.1230.1260.1240.129
90.1850.1870.1850.201
160.2470.2490.2470.276
250.3080.3090.3090.352
360.3720.3720.371
490.4320.4330.433
640.4940.4950.495
810.5550.5580.557
1000.6160.6210.619

Note: the bolded value refers to the average width of the narrowest confidence interval, and the underlined value means that the average width of the confidence interval cannot be calculated because the coefficient of the confidence interval is not within the specified range.