Question: 1. An inspector wants to develop 3-sigma level control charts (below table provides factors for 3 sigma level) for the weight of firewood that comes

1. An inspector wants to develop 3-sigma level

1. An inspector wants to develop 3-sigma level control charts (below table provides factors for 3 sigma level) for the weight of firewood that comes in a bag. Due to uneven shape of wood, weight of bag varies a lot. Draw X-bar chart and R-chart. For both charts, calculate UCL, CL and LCL by using the factors provided in the table. Is the process in control? Discuss your conclusion. Weight in pounds from 4 days with sample size of 3 ( 3 observations each time, n=3) are

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