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

Table 2

The LCL⁻ of the L-NEWMA t chart when ARL₀ = 200.

λ	n = 5	n = 7	n = 9	n = 11
0.10	−0.6811	−0.5958	−0.5614	−0.5430
0.20	−1.1493	−0.9854	−0.9227	−0.8880
0.30	−1.5763	−1.3314	−1.2367	−1.1838
0.40	−1.9932	−1.6610	−1.5315	−1.4634
0.50	−2.4137	−1.9866	−1.8214	−1.7343
0.75	−3.4872	−2.8192	−2.5577	−2.4219
0.90	−4.1474	−3.3416	−3.0280	−2.8575
1.00	−4.5961	−3.7043	−3.3526	−3.1667