Question

Control charts for X bar and R maintained on the tensile strength in kg of a certain yarn. The sub group size is 5 . The values X bar and R are computed for each sub group. After 25 subgroup ∑x=514.8 , ∑R=120.0 Compute the values of 3 sigma limits for X bar chart , Take R bar=2.326σ calculate UCL,LCL,and CL​

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