Mathematics · Statistical Quality Control
In statistical quality control and Shewhart control charts, the natural tolerance limits or expected process variation under normal conditions are commonly evaluated as:
- 1μ ± 1σ
- 2μ ± 2σ
- 3μ ± 3σ✓
- 4μ ± s/√n
Correct answer
μ ± 3σ
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