. 1983 Mar-Apr;88(2):105–116. doi: 10.6028/jres.088.006

Table 5.

Measurements on ampoules of n-Heptane.

A) The data
Set No.—
Ampoule		% purity		(% purity-99.99)·10⁴
2–05		99.9880		−20
3–04		99.9909		9
20–20		99.9956		56
7–07		99.9908		8
20–03		99.9901		1
14–10		99.9928		28
2–15		99.9915		15
8–14		99.9899		− 1
14–20		99.9906		6
7–17		99.9894		− 6
B) Biweight iterations: c =5, T⁽⁰⁾=7.0, s⁽⁰⁾=12.0, s_bi=17.2
Columns give weights $w_{i}^{(k)}$ corresponding to each observation y_i at k^th iteration. $T^{(k)} = \sum w_{i}^{(k)} y_{i} / \sum w_{i}^{(k)}$
obsv’n	(1)		(2)		(3)	(4)	(5)
−20	.8120		.8082		.8075	.8074	.8074
9	.9989		.9992		.9992	.9993	.9993
56	.4546		.4597		.4606	.4607	.4608
8	.9997		.9999		.9999	.9999	.9999
1	.9903		.9893		.9891	.9891	.9891
28	.8839		.8869		.8875	.8876	.8876
15	.9827		.9839		.9841	.9842	.9842
− 1	.9827		.9815		.9812	.9812	.9812
6	.9997		.9996		.9995	.9995	.9995
− 6	.9547		.9527		.9523	.9523	.9523
T⁽¹⁾=7.283 T⁽²⁾=7.334 T⁽³⁾=7.344 T⁽⁴⁾=7.345 T⁽⁵⁾=7.346 s_bi=18.648
Final location and scale estimates (original scale):
$\hat{μ}$ = 99.9900 + 7.346/10⁴ = 99.9907
$\hat{σ}$ = 18.648/10⁴ = .0019