Question: 4 d A manager wishes to build a control chart for a process. A total of five (05) samples are collected with eight (08) observations

4 d A manager wishes to build a control chart for
4 d A manager wishes to build a control chart for a process. A total of five (05) samples are collected with eight (08) 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, 2.81,8.17, and 3.31 respectively. The lower and upper control limits of the R- chart are respectively out of Select one: a. 0, 14.11 b. 0.94, 12.44 c. 0,15.25 d. None is correct e. 0.54, 12.84

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