(Solution) - In a production process for canvas a sample consisting of -(2025 Original AI-Free Solution)

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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 here. Use an appropriate 3-sigma control chart in determining whether the process is in control.