### Possible Answer

... the so-called 68–95–99.7 rule is a shorthand used to remember the percentage of values that lie within a ... within two standard deviations of the mean ... - read more

6 Relationship between standard deviation and mean. 6.1 Standard deviation of the mean; ... about 95 percent are within two standard deviations (μ ± 2σ), ... - read more

Please vote if the answer you were given helped you or not, thats the best way to improve our algorithm. You can also submit an answer or search documents about what percentage is within 1 standard deviation of the mean.