1 Standard Deviation from the mean, 2 Standard deviations from the mean, 3 Standard deviations from the mean, Process Variation = 6 standard deviations about the mean, Sample mean, Sample mean + 1 sigma, Sample mean + 2 sigma, Sample mean + 3 sigma, Sample mean - 1 sigma, Sample mean - 2 sigma, Sample mean - 3 sigma.

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