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68-95-99.7 Rule
Common Core: S.ID.4

68-95-99.7 Rule


This lesson will explain the 68-95-99.7 rule.

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Terms to Know
68-95-99.7 Rule

A rule that applies to normal distributions, stating that 68% of all data points fall within one standard deviation of the mean, 95% of all data points fall within two standard deviations of the mean, and 99.7% of all data points fall within three standard deviations of the mean.