[Step-by-Step] The number of imperfections in paper produced by a paper mill is observed over a period of several days. During production, the operators
Question: The number of imperfections in paper produced by a paper mill is observed over a period of several days. During production, the operators will tear off large sections of paper and place it over a light table, and then count the imperfections. The attached excel spreadsheet shows the area inspected and the number of imperfections for 25 samples. Use Minitab to construct a control chart for the number of imperfections per square meter. Revise the limits if necessary, assuming special causes for the out-of-control points are discovered and corrected. Submit your Minitab output.
Deliverable: Word Document 
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Solution: When would it be preferable to use an X̄ and R chart
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