Use an appropriate 3 sigma control chart

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Reference no: EM131410145

In a production process for canvas, a sample consisting of 25 square feet contains 4 discolored spots that must be touched up before shipping.

Data for this and subsequent samples, each consisting of 25 square feet of canvas, are shown on the next page. Use an appropriate 3-sigma control chart in determining whether the process is in control.

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Reference no: EM131410145

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