Construct control limits for the x chart

Construct control limits for the R chart

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Refer to the table Factors for Computing Control Chart Limits (3 sigma) for this problem. Autopitch devices are made for both major- and minor-league teams to help them improve their batting averages. When set at the standard position, Autopitch can throw hardballs toward a batter at an average speed of 51mph. To monitor these devices and to maintain the highest quality, Autopitch executive Neil Geismar takes samples of 12 devices at a time. The average range is 5mph. a) Using this information, construct control limits for the x-chart. UCLx=mph (round your response to three decimal places). Data Table