Question: Quantitative Question: Three samples of five observations each have been taken for a production process, with actual measurements (in centimeters) shown below. Construct a three-sigma

Quantitative Question:

Three samples of five observations each have been taken for a production process, with actual measurements (in centimeters) shown below. Construct a three-sigma mean 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	Sample 2	Sample 3
Observation 1	14	13	12
Observation 2	13	12	13
Observation 3	13	14	14
Observation 4	12	14	12
Observation 5	12	10	14

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