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  2. 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 ...

  3. 68–95–99.7 rule - Wikipedia

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

    For an approximately normal data set, the values within one standard deviation of the mean account for about 68% of the set; while within two standard deviations account for about 95%; and within three standard deviations account for about 99.7%.

  4. List of countries by literacy rate - Wikipedia

    en.wikipedia.org/wiki/List_of_countries_by...

    This is an accepted version of this page This is the latest accepted revision, reviewed on 1 January 2025. This article needs to be updated. Please help update this article to reflect recent events or newly available information. (March 2022) World map of countries shaded according to the literacy rate for all people aged 15 and over This is a list of countries by literacy rate. The global ...

  5. 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 ...

  6. List of named alloys - Wikipedia

    en.wikipedia.org/wiki/List_of_named_alloys

    AA-8000: used for electrical building wire in the U.S. per the National Electrical Code, replacing AA-1350. [1]Al–Li (2.45% lithium): aerospace applications, including the Space Shuttle

  7. We are the 99% - Wikipedia

    en.wikipedia.org/wiki/We_are_the_99%

    The slogan "We are the 99%" became a unifying slogan of the Occupy movement in August 2011 [3] after a Tumblr blog, "wearethe99percent.tumblr.com," was launched in late August 2011 by a 28-year-old New York activist going by the name of "Chris" together with Priscilla Grim.

  8. Isotopes of iridium - Wikipedia

    en.wikipedia.org/wiki/Isotopes_of_iridium

    Iridium-192 (symbol 192 Ir) is a radioactive isotope of iridium, with a half-life of 73.83 days. [11] It decays by emitting beta (β) particles and gamma (γ) radiation. About 96% of 192 Ir decays occur via emission of β and γ radiation, leading to 192 Pt.

  9. Student's t-distribution - Wikipedia

    en.wikipedia.org/wiki/Student's_t-distribution

    The t distribution also appeared in a more general form as Pearson type IV distribution in Karl Pearson's 1895 paper. [ 25 ] In the English-language literature, the distribution takes its name from William Sealy Gosset 's 1908 paper in Biometrika under the pseudonym "Student". [ 26 ]