Question: how to find upper and lower control level? Refer to Table.S6.1- Factors for Compuling Control Chart Limits (3 sigma) for this problem. Twolve samples, each

how to find upper and lower control level?

Refer to Table.S6.1- Factors for Compuling Control Chart Limits (3 sigma) for this problem. Twolve samples, each containing five parts, were taken from a process that produces steel rods at Emmanual Kodzi's factory. The length of each rod in the samples was dotermined. The restilts were tabulated and sample means and ranges were computed. The results wote: Cor the given data, the xx= inches (round your response to four decimal places). lased on the sampling done, the control limits for 3-sigma x chart are: Upper Control Limit (UCL-) = inches (round your response to four decimal places)

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