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 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, 773,6,89, 7.56, and 75 respectively. The lower and upper control limits of the R- chart are respectively Select one: O a. 0, 18.05 b. None is correct O c. 116.22 O d. 0,15.22 O e. 0,13.32

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