Question: Please help me with the right option 16 A manager wishes to build a control chart for a process. A total of five (05) samples

Please help me with the right option 16 Please help me with the right option 16 A manager
A manager wishes to build a control chart for a process. A total of five (05) samples are collected with four (04) observations within each sample. The sample means (X-bar) are; 14.09, 13.94, 16.86, 18.77, and 16.64 respectively. Also, the corresponding ranges are; 9.90, 7.73, 2.89, 7.56, and 3.49 respectively. The lower and upper control limits of the x-bar chart respectively are Select one: O a. 16.55, 11.47 O b. 12.40, 19.72 O c. 18.55, 13.47 O d. 11.45, 20.67 O e. None is correct

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