Question: please show work You're manufacturing a widget and using an X-bar and R-chart to control the critical feature of the product. Your normal process has
You're manufacturing a widget and using an X-bar and R-chart to control the critical feature of the product. Your normal process has the following attributes: The x-double bar is 225, R-bar is 12 , and n=8. Identify the upper and lower control limits for the range chart
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