Determine the upper and lower control limits

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Reference no: EM131257227

Thirty-five samples of size 7 each were taken from a fertilizer-bag-filling machine. The results were overall mean = 57.75 lb; average range = 1.78 lb.

a) Determine the upper and lower control limits of the x -chart, where σ = 3.

b) Determine the upper and lower control limits of the R -chart, where σ = 3.

Reference no: EM131257227

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