Question: 4. A process sampled 20 times with a sample of size 8 resulted in x = 28.5 and R = 1.6. Compute the upper and

4. A process sampled 20 times with a sample of size 8 resulted in x = 28.5 and R = 1.6.

Compute the upper and lower control limits for the x and R charts for this process.

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