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 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 5.0 respectively. The lower and upper control limits of the x-bar chart are respectively O a 11.29. 20.65 Ob 1144. 20.66 Oc 1147.16.55 Od None is correct 11.23.20.89
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