Question: A manager wishes to build a control chart for a process. A total of five (05) samples are collected with five (05) observations within each
A manager wishes to build a control chart for a process. A total of five (05) samples are collected with five (05) 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, 37, 281,8.17, and 3.31 rtespectively. The lower and upper control limits of the x-bar chart are respectively Select one O a 1240, 19.72 Ob 18.55, 13.47 Oc 16.55, 11.47 O d. None is correct Oe 12.60, 20.36
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