Question: Control charts for X and scharts are maintained on a quality characteristic. The sample size is 9. After 25 samples, we obtain 25 25 Ex;=

Control charts for X and scharts are maintained

Control charts for X and scharts are maintained on a quality characteristic. The sample size is 9. After 25 samples, we obtain 25 25 Ex;= 10800 and Es; = 360 i = 1 1 = 1 (5pts) The upper control limit for the x chart is (5pts) The lower control limit for the s chart is (5pts) If both charts exhibit control, estimated o for this process is

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