Control charts for X and scharts are maintained on a quality characteristic. The sample size is 9. After 25 samples, we obtain 25 25 ΣΧ-13600 and Σs-350 i=1 i=1 The upper control limit for the X chart...

Extracted text: Control charts for X and scharts are maintained on a quality characteristic. The sample size is 9. After 25 samples, we obtain 25 25 ΣΧ-13600 and Σs-350 i=1 i=1 The upper control limit for the X chart is The lower control limit for the s chart is If both charts exhibit control, estimated o for this process is >