3 Sigma(σ) Rule, 68–95–99.7 Rule, Empirial Rule
In statistics, the 68-95-99.7 rule, also known as the empirical rule, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations(σ) of the mean, respectively.
2024. 4. 11.