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  2. F-test - Wikipedia

    en.wikipedia.org/wiki/F-test

    The F table serves as a reference guide containing critical F values for the distribution of the F-statistic under the assumption of a true null hypothesis. It is designed to help determine the threshold beyond which the F statistic is expected to exceed a controlled percentage of the time (e.g., 5%) when the null hypothesis is accurate.

  3. Standard normal table - Wikipedia

    en.wikipedia.org/wiki/Standard_normal_table

    Example: To find 0.69, one would look down the rows to find 0.6 and then across the columns to 0.09 which would yield a probability of 0.25490 for a cumulative from mean table or 0.75490 from a cumulative table. To find a negative value such as -0.83, one could use a cumulative table for negative z-values [3] which yield a probability of 0.20327.

  4. Reference range - Wikipedia

    en.wikipedia.org/wiki/Reference_range

    The standard definition of a reference range for a particular measurement is defined as the interval between which 95% of values of a reference population fall into, in such a way that 2.5% of the time a value will be less than the lower limit of this interval, and 2.5% of the time it will be larger than the upper limit of this interval, whatever the distribution of these values.

  5. Ionic strength - Wikipedia

    en.wikipedia.org/wiki/Ionic_strength

    The molar ionic strength, I, of a solution is a function of the concentration of all ions present in that solution. [3]= = where one half is because we are including both cations and anions, c i is the molar concentration of ion i (M, mol/L), z i is the charge number of that ion, and the sum is taken over all ions in the solution.

  6. 2020 in science - Wikipedia

    en.wikipedia.org/wiki/2020_in_science

    The latest State of the Climate report finds that 2010 to 2019 was the hottest decade on record globally, with an increase of 0.39 °C (0.7 °F) above the long-term average, and 2019 either the second or third warmest year on record. [142] [143]

  7. Orders of magnitude (mass) - Wikipedia

    en.wikipedia.org/wiki/Orders_of_magnitude_(mass)

    10 −1 g dg decigram 10 1 g dag decagram 10 −2 g cg: centigram: 10 2 g hg hectogram 10 −3 g mg: milligram: 10 3 g kg: kilogram: 10 −6 g μg: microgram (mcg) 10 6 g Mg megagram 10 −9 g ng: nanogram: 10 9 g Gg gigagram 10 −12 g pg picogram 10 12 g Tg teragram 10 −15 g fg femtogram 10 15 g Pg petagram 10 −18 g ag attogram 10 18 g Eg ...

  8. Peak oil - Wikipedia

    en.wikipedia.org/wiki/Peak_oil

    L. F. Ivanhoe OPEC plateau 2000–2050 2003: Greene, et al. 2020–2050 1995: Petroconsultants: 2005 2003: Laherrère: 2010–2020 1997: Ivanhoe 2010 2003: Lynch No visible peak 1997: J. D. Edwards 2020 2003: Shell After 2025 1998: IEA: 2014 2003: Simmons 2007–2009 1998: Campbell & Laherrère: 2004 2004: Bakhitari 2006–2007 1999: Campbell ...

  9. List of inventors - Wikipedia

    en.wikipedia.org/wiki/List_of_inventors

    Ronald Price Hickman (1932–2011), U.S. – designed the original Lotus Elan, the Lotus Elan +2 and the Lotus Europa, as well as the Black & Decker Workmate; Rowland Hill (1795–1879), UK – postage stamp; Maurice Hilleman (1919–2005) – vaccines against childhood diseases; Tanaka Hisashige (1799–1881), Japan – Myriad year clock