Control charts for X and Rare kept on the manufacture of a drive shaft. After 30...

 

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Control charts for X and Rare kept on the manufacture of a drive shaft. After 30 subgroups have been drawn and inspected, and the diameters recorded, Ex=624.30 mm, ER=12.3 mm. The subgroup size is 5. Assume that the diameters of the shafts are normally distributed. a. Assuming the process is in a state of control, compute the X and R chart center line and control limits for the next production period. b. Assuming the process standard deviation is 0.1398, What is the probability that an item chosen at random will have a diameter smaller than 20.3044 mm? Control charts for X and Rare kept on the manufacture of a drive shaft. After 30 subgroups have been drawn and inspected, and the diameters recorded, Ex=624.30 mm, ER=12.3 mm. The subgroup size is 5. Assume that the diameters of the shafts are normally distributed. a. Assuming the process is in a state of control, compute the X and R chart center line and control limits for the next production period. b. Assuming the process standard deviation is 0.1398, What is the probability that an item chosen at random will have a diameter smaller than 20.3044 mm?

Answer rating: 100% (QA)

Solution Given Rata Ex 624 30 mm ER 123 mm Subyroup Stze n X 624 3 ... View the full answer