Erratum

CORRIGENDUM

Bakir, S. T. (2004). A Distribution-Free Shewhart Quality Control Chart Based on Signed-Ranks. Quality Engineering, Vol. 16, No. 4, pp. 613–623.

Table 1 of our paper had a missing first row, which led to some minor errors in its other entries. The corrected table is given below.

Table 1 Values of in subgroups of size n and false alarm rates

	n = 4		n = 5		n = 6
UCL
9	16	0.06250000	6.40	0.1562500	4.57	0.2187500
10	16	0.06250000	10.67	0.0937500	6.40	0.1562500
11	∞	0.0	10.67	0.0937500	6.40	0.1562500
12			16	0.0625000	9.14	0.1093750
13			16	0.0625000	9.14	0.1093750
14			32	0.0312500	12.80	0.0781250
15			32	0.0312500	12.80	0.0781250
16			∞	0.0	21.33	0.0468750
17					21.33	0.0468750
18					32.00	0.0312500
19					32.00	0.0312500
20					64	0.0156000
21					64	0.0156000
22					∞	0.0

Notes

Note: The author wishes to acknowledge Dr. Subha Chakraborti for pointing out the error.