Question: A manager wishes to build a control chart for a process. A total of five (05) samples are collected with seven (07) observations within each

A manager wishes to build a control chart for a

A manager wishes to build a control chart for a process. A total of five (05) samples are collected with seven (07) observations within each sample. The sample means (X-bar) are; 15.36, 14.61, 16.36, 20.28, and 15.77 respectively. Also, the corresponding ranges are; 10.79, 8.37,4.81, 8.17, and 3.31 respectively. The lower and upper control limits of the x-bar chart are respectively O a. 13.27. 19.69 b. None is correct O c. 12.60.20.36 O d. 13.50. 19.45 O e. 16.55. 11.47

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