Question: Control charts for and s are maintained on a quality characteristic. The sample size is n = 4 . After 3 0 samples, we obtain

Control charts for and s are maintained on a quality characteristic. The sample size is n =4. After 30
samples, we obtain
(a) Find the three-sigma limits for the s chart.
(b) Assuming that both charts exhibit control, estimate the parameters m and s Control charts for and s are maintained on a quality characteristic. The sample size is n =4. After 30
samples, we obtai

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