To monitor product quality, Wintel inspects 30 chips each week and determines the fraction of defective chips.
Question:
To monitor product quality, Wintel inspects 30 chips each week and determines the fraction of defective chips. The resulting data are in the file P20_43.xlsx. Construct a p chart based on 12 weeks of data. Is week 5 out of control? Why or why not? Is week 6 out of control? Why or why not? What do these charts tell you about Wintel's production process?
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Defectives Fraction Defective 8 0267 10 0333 12 0400 14 0467 12 0400 2 0067 2 0067 4 0133 5 0167 4 0...View the full answer
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6th edition
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