Table 3.

Biweight variances and deficiencies: n = 20.

Tuning Constant	l.5xMAD — Fixed			1.5xMAD — Iterative			sbi — Fixed			sbi — Iterative
	Variance	SE	Deficiency (%)	Variance	SE	Deficiency (%)	Variance	SE	Deficiency (%)	Variance	SE	Deficiency (%)
Gaussian (optimal = 1.0)
3	1.0973	0.0076	8.8	1.0841	0.0069	7.8	1.2111	0.0147	17.4	1.2159	0.0154	17.8
4	0369	0039	3.6	0299	0034	2.9	.0842	0064	7.8	0769	0051	7.1
5	0172	0026	1.7	0117	0013	1.2	0387	0036	3.7	0331	0024	3.2
6	0087	0015	0.9	0056	0007	0.6	0187	0019	1.8	0163	0015	1.6
7	0047	0008	0.5	0030	0004	0.3	0096	0010	0.9	0084	0008	0.8
8	0027	0005	0.3	0018	0002	0.2	0052	0005	0.5	0045	0004	0.4
9	0017	0003	0.2	0011	0001	0.1	0030	0003	0.3	0027	0002	0.3
One-Wild (optimal = 1.0526)
3	1.1597	0.0077	9.2	1.1494	0.0055	8.4	1.2663	0.0148	16.9	1.2561	0.0139	16.2
4	1313	0040	7.0	1298	0037	6.8	1517	0066	8.6	1421	0053	7.8
5	1572	0049	9.0	1594	0050	9.2	1198	0034	6.0	1185	0034	5.9
6	2082	0069	12.9	2145	0071	13.3	1273	0037	6.6	1289	0037	6.8
7	2745	0094	17.4	2848	0097	18.1	1522	0047	8.6	1578	0050	9.1
8	3532	0122	22.2	3721	0127	23.2	1905	0062	11.6	2019	0067	12.4
9	4439	0151	27.1	4690	0159	28.3	2431	0081	15.3	2700	0092	17.1
Slash (optimal — 5.2666)
3	6.2724	0.2046	16.0	6.4046	0.2284	17.8	5.6057	0.1410	6.1	6.7146	0.1541	7.8
4	7.5085	3189	29.9	8.1706	0.4386	35.5	6.2212	1976	15.3	6.4293	0.2137	18.1
5	8.8490	4364	40.5	10.255	0.6849	48.6	7.3065	2822	27.9	8.3053	0.4552	36.6
6	10.157	5377	48.1	12.260	0.8502	57.0	8.6312	4237	39.0	10.434	0.6585	49.5
7	11.453	6307	54.0	13.964	1.0004	62.3	10.116	5670	47.9	12.580	0.8205	58.1
8	12.733	7235	58.6	15.762	1.1107	66.6	11.832	7166	55.4	15.324	1.0068	65.7
9	13.996	8083	62.3	17.100	1.1866	69.2	13.442	8405	60.8	18.235	1.1790	71.1