Question: 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

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 four (04) observations within each sample. The sample means (X-ban) are; 14.5, 13.94, 16.86, 18.77, and 16.64 respectively. Also, the corresponding ranges are; 9.90, 7.73, 4.51, 7.56, and 3.49 respectively. The lower and upper control limits of the x-bar chart are respectively a. None is correct O b. 12.21, 19.91 0 c. 18.55, 13.47 O d. 11.21, 20.91 0 e. 11.47, 16.55 0

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