New One-Sided EWMA t Charts without and with Variable Sampling Intervals for Monitoring the Process Mean

Table 8

A set of sample data and the corresponding values of the charting statistics of different EWMA t charts.

i	Xi,1 (ml)	Xi,2 (ml)	Xi,3 (ml)	Xi,4 (ml)	Xi,5 (ml)	Ti	(L-EWMA)	(L-NEWMA)
1	499.51	499.55	500.80	499.82	499.86	−0.3937	−0.0394	−0.0394
2	500.50	500.29	502.29	499.11	499.91	0.8012	0.0000	0.0000
3	502.37	499.45	499.95	498.84	499.00	−0.1215	−0.0122	0.0000
4	499.24	499.67	501.11	500.18	498.81	−0.4973	−0.0607	−0.0245
5	498.95	499.91	497.79	499.57	499.27	−2.4806	−0.3027	−0.2701
6	502.17	497.83	500.23	499.74	500.11	0.0232	−0.2701	−0.2408
7	500.75	501.32	500.20	501.76	497.86	0.5541	−0.1877	−0.1613
8	500.18	499.72	499.06	499.94	499.77	−1.4248	−0.3114	−0.2876
9	500.71	497.56	499.04	498.81	501.18	−0.8173	−0.3620	−0.3406
10	498.89	499.51	498.62	499.21	499.92	−3.3725	−0.6630	−0.6438
11	499.47	501.70	500.04	500.21	499.87	0.6775	−0.5290	−0.5117
12	498.50	500.01	498.81	500.39	499.39	−1.6377	−0.6398	−0.6243
13	499.71	499.32	498.70	501.31	500.27	−0.3113	−0.6070	−0.5930
14	498.13	498.59	499.73	499.60	499.22	−3.1019	−0.8572	−0.8446
15	499.83	500.70	500.37	499.05	500.31	0.1815	−0.7533	−0.7420
16	499.90	498.38	498.39	498.28	498.07	−4.2423	−1.1022	−1.0920
17	499.73	499.40	499.08	498.76	498.60	−4.2929	−1.4213	−1.4121
18	498.63	499.43	499.43	499.31	498.94	−5.4054	−1.8197	−1.8114
19	498.99	498.34	498.58	499.40	499.04	−6.0872	−2.2464	−2.2390
20	500.92	500.25	500.07	499.55	497.15	−0.6361	−2.0854	−2.0787