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; 15.36, 14.61, 16.36, 20.28, and 15.77, respectively. Also, the corresponding ranges are; 10.79, 8.37, 4.81, 8.17, and 3.31 respectively. The lower and upper control limits of the x-bar chart are .respectively O a. 16.55, 11.47 ОБ. 18.55, 13.47 O c. 12.40, 19.72 O d. None is correct

Practical Management Science
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Author:WINSTON, Wayne L.
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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; 15.36, 14.61, 16.36, 20.28, and 15.77, respectively.
Also, the corresponding ranges are; 10.79, 8.37, 4.81, 8.17, and 3.31 respectively. The lower and upper control limits
of the x-bar chart are
respectively
O a.
16.55, 11.47
O b. 18.55, 13.47
O c. 12.40, 19.72
O d. None is correct
O e.
11.30, 21.65
Transcribed Image Text: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; 15.36, 14.61, 16.36, 20.28, and 15.77, respectively. Also, the corresponding ranges are; 10.79, 8.37, 4.81, 8.17, and 3.31 respectively. The lower and upper control limits of the x-bar chart are respectively O a. 16.55, 11.47 O b. 18.55, 13.47 O c. 12.40, 19.72 O d. None is correct O e. 11.30, 21.65
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