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  2. 68–95–99.7 rule - Wikipedia

    en.wikipedia.org/wiki/68–95–99.7_rule

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  3. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    About 68% of values drawn from a normal distribution are within one standard deviation σ from the mean; about 95% of the values lie within two standard deviations; and about 99.7% are within three standard deviations. [6] This fact is known as the 68–95–99.7 (empirical) rule, or the 3-sigma rule.

  4. Standard deviation - Wikipedia

    en.wikipedia.org/wiki/Standard_deviation

    This defines a point P = (x 1, x 2, x 3) in R 3. Consider the line L = {(r, r, r) : r ∈ R}. This is the "main diagonal" going through the origin. If our three given values were all equal, then the standard deviation would be zero and P would lie on L. So it is not unreasonable to assume that the standard deviation is related to the distance ...

  5. Three-sigma rule - Wikipedia

    en.wikipedia.org/?title=Three-sigma_rule&redirect=no

    This page was last edited on 24 September 2024, at 05:20 (UTC).; Text is available under the Creative Commons Attribution-ShareAlike 4.0 License; additional terms may apply.

  6. Outlier - Wikipedia

    en.wikipedia.org/wiki/Outlier

    Relative probabilities in a normal distribution. In the case of normally distributed data, the three sigma rule means that roughly 1 in 22 observations will differ by twice the standard deviation or more from the mean, and 1 in 370 will deviate by three times the standard deviation. [6]

  7. The 3-3-3 Rule Can Be a Mental Health Game Changer - AOL

    www.aol.com/3-3-3-rule-mental-130000886.html

    The 3-3-3 Rule Can Be a Mental Health Game Changer. Alyssa Jung. August 31, 2024 at 9:00 AM "Hearst Magazines and Yahoo may earn commission or revenue on some items through these links."

  8. Rule of three (statistics) - Wikipedia

    en.wikipedia.org/wiki/Rule_of_three_(statistics)

    By symmetry, for only successes, the 95% confidence interval is [1−3/ n,1]. The rule is useful in the interpretation of clinical trials generally, particularly in phase II and phase III where often there are limitations in duration or statistical power. The rule of three applies well beyond medical research, to any trial done n times. If 300 ...

  9. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-000158935.html

    "Sigma” is a slang word for “the best” or someone who is a humble alpha male. ... Another definition for “sigma” says Lindsay, is “the best.” ... math problems (to solve) with an ...