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Lay's makes potato chip bags that need to be between 99.5oz and 100.5oz. You do measurements, and you find that a normal distribution describes Lay's

Lay's makes potato chip bags that need to be between 99.5oz and 100.5oz. You do measurements, and you find that a normal distribution describes Lay's actual bagging machine performance. Specifically, the mean of the process is 99.55 oz, and the process standard deviation is 0.08 oz. If Lay's wants to achieve "six sigma" quality, by what percentage does Lay's need to change the process's standard deviation?

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