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68-95-99.7 rule. In DICTIOUS you will not only get to know all the dictionary meanings for the word
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English
Proper noun
68-95-99.7 rule
- (statistics mnemonic) The rule stating that a normal distribution will have 68% of its observations within one standard deviation of the mean, 95% within two, and 99.7% within three.
Translations
statistics: empirical rule of 3σ
Further reading