Question: In process industry during a daily production run, a total of five (05) samples are collected with four (04) observations within each sample. The sample

In process industry during a daily production
In process industry during a daily production run, 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. 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 are respectively O a 16.55, 11.47 O b. 12.40, 19.72 OC. None is correct Od 11.45, 20.67 e. 18.55, 13.47

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