Question: PROBLEM C: Use the following to answer questions 20 - 21: McDaniel Shipyards wants to develop control charts to assess the quality of its steel

PROBLEM C: Use the following to answer questions 20 - 21: McDaniel Shipyards wants to develop control charts to assess the quality of its steel plate. They take ten sheets of 1" steel plate and compute the number of cosmetic flaws on each roll. Each sheet is 20' by 100'. Based on the following data, develop limits for the control chart, plot the control chart, and determine whether the process is in control. Number of Sheet flaws vouw 20. Calculate the standard deviation of control chart. (a) the standard deviation = 1.0832 (b) the standard deviation = 1.1832 (c) the standard deviation = 1.4 (d) the standard deviation = 1.04 21. Using +30 limits, calculate the LCL and UCL for these data. (a) UCL = 3.549; LCL = -3.549 (b) UCL = 3.549, LCL = 0 (c) UCL = 1.4; LCL = -1.4 (d) UCL = 1.4; LCL = 0 (e) UCL = 4.949; LCL = 0

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