Question: Quantitative Question (Write legibly; Credit will be given only if appropriate work is done.) Three samples of four observations each have been taken for a

Quantitative Question (Write legibly; Credit will

Quantitative Question (Write legibly; Credit will be given only if appropriate work is done.) Three samples of four observations each have been taken for a production process, with actual measurements (in centimeters) shown below. Construct a three-sigma range control chart (a range chart only). There is no need to draw charts. Just calculate upper and lower control limits. Is the process in control if only a range chart is used? Sample 1 14 Sample 2 13 Sample 3 12 15 15 14 Observation 1 Observation 2 Observation 3 Observation 4 13 14 15 12 16 13

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