Control limits and x bar chart

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Reference no: EM1316728

Thirty-two samples of 8 items each were collected from a process. The average sample mean is 12 and the average range is 0.10. The upper and lower control limits, respectively, for an:

X bar Chart are:

a. 12.04 and 11.96.

b. 12.07 and 11.93.

c. 12.10 and 11.90.

d. 12.30 and 11.70.

Reference no: EM1316728

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