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  2. 68–95–99.7 rule - Wikipedia

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

    In the empirical sciences, the so-called three-sigma rule of thumb (or 3 σ rule) expresses a conventional heuristic that nearly all values are taken to lie within three standard deviations of the mean, and thus it is empirically useful to treat 99.7% probability as near certainty.

  3. Nines (notation) - Wikipedia

    en.wikipedia.org/wiki/Nines_(notation)

    The purity of a gas is generally expressed as a grade prefixed with the letter N (rather than postfixed), indicating the "number of nines" in the percentage or decimal fraction. For example, a N2.0 gas is 99% (two nines) pure and 1% impurities by volume; a N6.0 gas is 99.9999% (six nines) pure, with 1 part per million (1 ppm or 1 vpm, volume ...

  4. Our DNA is 99.9 percent the same as the person sitting next ...

    www.aol.com/article/2016/05/06/our-dna-is-99-9...

    Our bodies have 3 billion genetic building blocks, or base pairs, that make us who we are. And of those 3 billion base pairs, only a tiny amount are unique to us, making us about 99.9% genetically ...

  5. We are the 99% - Wikipedia

    en.wikipedia.org/wiki/We_are_the_99%

    According to the Economic Policy Institute as of 2018 (based on data preceding 1970s to 2015), all households (national) with incomes less than $421,926 belonged to the lower 99% of wage earners. [47] Data on the minimum yearly income to be considered among the 1% vary per source, [48] ranging from about $500,000 [49] to $1.3 million. [46]

  6. Confidence interval - Wikipedia

    en.wikipedia.org/wiki/Confidence_interval

    For example, out of all intervals computed at the 95% level, 95% of them should contain the parameter's true value. [ 3 ] Factors affecting the width of the CI include the sample size , the variability in the sample, and the confidence level. [ 4 ]

  7. History of mathematics - Wikipedia

    en.wikipedia.org/wiki/History_of_mathematics

    Islamic scholars carried knowledge of this number system to Europe by the 12th century, and it has now displaced all older number systems throughout the world. Various symbol sets are used to represent numbers in the Hindu–Arabic numeral system, all of which evolved from the Brahmi numerals. Each of the roughly dozen major scripts of India ...

  8. Wikipedia:List of Wikipedians by number of edits - Wikipedia

    en.wikipedia.org/wiki/Wikipedia:List_of...

    99.985% of all contributors 100,000 edits 14,000 top 0.007% of contributors top 1,000 of all contributors 99.993% of all contributors 250,000 edits 66,666 top 0.0015% of contributors top 200 of all contributors 99.9985% of all contributors 500,000 edits 250,000 top 0.0004% of contributors top 50 of all contributors 99.9996% of all contributors

  9. List of religious populations - Wikipedia

    en.wikipedia.org/wiki/List_of_religious_populations

    The list of religious populations article provides a comprehensive overview of the distribution and size of religious groups around the world. This article aims to present statistical information on the number of adherents to various religions, including major faiths such as Christianity, Islam, Hinduism, Buddhism, and others, as well as smaller religious communities.