Question: A manager wishes to build a control chart for a process. A total of five (05) samples are collected with seven (7) observations within each

A manager wishes to build a control chart for a process. A total of five (05) samples are collected with seven (7) observations within each sample. The sample means X bar are 15.36.1461.16.36:20.28, and 15.77 respectively. Also the corresponding ranges are 10.79.8.37.281817 and 3.31 respectively. The lower and upper control limits of the x-bar chart are respectively Select one: a 12.60. 20:36 b. 13.67. 19.29 O 16.55. 11.47 O d. None is correct O e. 13.27. 19.69

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