# 68–95–99.7 rule definition

• noun:
• That a standard distribution has 68% of the observations within one standard deviation associated with the mean, 95per cent within two, and 99.7% within three.

## Related Sources

• Definition for "68–95–99.7 rule"
• That a standard distribution has 68% of the…
• Synonym for "68–95–99.7 rule"
• empirical rule