Determine the upper and lower control limits

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Reference no: EM132106413

Several samples of size 4 were taken from a production line. The results were: Overall mean x ?=70 ; Average range R ¯=5.

(a) Determine the upper and lower control limits of the x ¯ chart. Please give the formulas for calculating UCL and LCL and at least one step of calculation.

(b) Determine the upper and lower control limits of the R chart. Please give the formulas for calculating UCL and LCL and at least one step of calculation.

Reference no: EM132106413

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