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A c chart is to be used to control soldering imperfections

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Reference no: EM13578057

A c chart is to be used to control soldering imperfections on a certain mass-produced circuit board. After 250 circuit boards have been inspected, a total of 300 bad solder joints were found.

(a) Calculate 3-sigma control limits and the central line for the c chart.

Reference no: EM13578057

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