Find the indicated control limits.For a production process for which there is a great deal of data since its last modification, the population mean ? and the population standard deviation ? are assumed known. For such a process we have the following values for an   chart:  (The value A is found in the table of control chart factors).In a chalk-producing factory, after production, the length of six sample pieces of chalk is checked every 15 minutes. For this process, ? = 3.67 in. and ? = 0.12 in. Find the central line, UCL, and LCL for the mean.

A. 3.67, 3.817, 3.523
B. 3.67, 3.806, 3.534
C. 3.67, 3.831, 3.509
D. 3.67, 3.728, 3.612


Answer: A

Mathematics

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