Question: Amanager wishes to build a control chart for a process. A total of five (05) samples are collected with four (04) observations within each sample.

Amanager 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
Amanager 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-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. 11.45, 20.67 O b. 13.40, 19.72 OC.11.47.16.55 O d. 18.55.13.47

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