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Determine the upper and lower control limits of the chart

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1. Forty samples of size 5 each were taken from a fertilizer-bag-filling machine (standard deviation of the population is unknown). The results from the forty samples were the overall mean = 62.30 lb; average range = 1.30 lb

a. Determine the upper and lower control limits of the chart, where Z=3 or 3σ.

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

Please show step by step. I have missed this one twice on homework.

Reference no: EM132630006

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