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  2. 68–95–99.7 rule - Wikipedia

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

    These numerical values "68%, 95%, 99.7%" come from the cumulative distribution function of the normal distribution. The prediction interval for any standard score z corresponds numerically to (1 − (1 − Φ μ , σ 2 (z)) · 2) .

  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. High availability - Wikipedia

    en.wikipedia.org/wiki/High_availability

    99.5% ("two nines five") 1.83 days 10.98 hours 3.65 hours 50.40 minutes ... N represents the total number of components in the system. x is the number of components ...

  5. We are the 99% - Wikipedia

    en.wikipedia.org/wiki/We_are_the_99%

    Median household wealth dropped by 36.1% compared to a drop of only 11.1% for the top 1%, further widening the gap. [ 44 ] [ 45 ] [ 46 ] During the economic expansion between 2002 and 2007, the income of the top 1% had grown 10 times faster than the income of the bottom 90% and 66% of total income gains went to the 1%.

  6. 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 ...

  7. Soweto - Wikipedia

    en.wikipedia.org/wiki/Soweto

    (77.5) 26.1 (79.0) 22.7 (72.9) ... Songs and interview from NPR's All Things Considered Soweto Gospel Choir: ... Michael Mabaso also comes from here. This is a ...

  8. 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.

  9. Technetium-99m - Wikipedia

    en.wikipedia.org/wiki/Technetium-99m

    This chain of decay was later shown to have the mass number 99, and (...) the 6.6-h activity acquired the designation ‘technetium-99m. Later in 1940, Emilio Segrè and Chien-Shiung Wu published experimental results of an analysis of fission products of uranium-235, including molybdenum-99, and detected the presence of an isomer of element 43 ...