Q2(7 marks) In a grinding process, the value for roughness was measured in (mm).Use the data in the table below to answer the following questions: 30 8 00 30 11 12 Time LC Subgroup 38 30 46 36 26 41 32 24 39 35 30 37 LCL a.Plot the data points on the x-bar chart and on the R-chart b.Suggest a cause of variation for each point. Fully explain this cause, its type and category.
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