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CStone's avatar

Wow.

3 Sigma event

A 3 Sigma event refers to a process that produces results with 99.7% accuracy or 99.7% of outcomes falling within three standard deviations from the mean. In other words, it means that the process has a 99.7% chance of producing results within normal variation, while the remaining 0.3% of outcomes fall outside the expected range.

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