Empirical Rule Calculator
68% Rule (±1σ)
95% Rule (±2σ)
99.7% Rule (±3σ)
Understanding the Empirical Rule
Key Points
- • 68% of data falls within ±1 standard deviation of the mean
- • 95% of data falls within ±2 standard deviations
- • 99.7% of data falls within ±3 standard deviations