### Possible Answer

Dark blue is less than one standard deviation from the mean. For the normal distribution, ... About 68.27% of the values lie within one standard deviation of the mean. Similarly, about 95.45% of the values lie within two standard deviations of the mean. - read more

6 Relationship between standard deviation and mean. 6.1 Standard deviation of the mean (SDOM) 7 Rapid calculation methods. 7.1 Weighted ... where μ is the arithmetic mean), about 95 percent are within two standard deviations (μ ± 2σ), and about 99.7 percent lie within three standard ... - read more

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