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  2. Indiana pi bill - Wikipedia

    en.wikipedia.org/wiki/Indiana_Pi_Bill

    The Indiana pi bill was bill 246 of the 1897 sitting of the Indiana General Assembly, one of the most notorious attempts to establish mathematical truth by legislative fiat. Despite its name, the main result claimed by the bill is a method to square the circle .

  3. Symmetric mean absolute percentage error - Wikipedia

    en.wikipedia.org/wiki/Symmetric_mean_absolute...

    In contrast to the mean absolute percentage error, SMAPE has both a lower and an upper bound. Indeed, the formula above provides a result between 0% and 200%. Indeed, the formula above provides a result between 0% and 200%.

  4. Fraction of inspired oxygen - Wikipedia

    en.wikipedia.org/wiki/Fraction_of_Inspired_Oxygen

    Fraction of inspired oxygen (F I O 2), correctly denoted with a capital I, [1] is the molar or volumetric fraction of oxygen in the inhaled gas. Medical patients experiencing difficulty breathing are provided with oxygen-enriched air, which means a higher-than-atmospheric F I O 2 .

  5. Hückel method - Wikipedia

    en.wikipedia.org/wiki/Hückel_method

    The method predicts how many energy levels exist for a given molecule, which levels are degenerate and it expresses the molecular orbital energies in terms of two parameters, called α, the energy of an electron in a 2p orbital, and β, the interaction energy between two 2p orbitals (the extent to which an electron is stabilized by allowing it ...

  6. Effect size - Wikipedia

    en.wikipedia.org/wiki/Effect_size

    In statistics, an effect size is a value measuring the strength of the relationship between two variables in a population, or a sample-based estimate of that quantity. It can refer to the value of a statistic calculated from a sample of data, the value of one parameter for a hypothetical population, or to the equation that operationalizes how statistics or parameters lead to the effect size ...

  7. Van der Waals equation - Wikipedia

    en.wikipedia.org/wiki/Van_der_Waals_equation

    The graph on the right is the square (0,0),(1.1,1.1) of the left graph expanded to display the overlap between the inversion and saturation curves. In terms of b / v {\displaystyle b/v} the equation has a simple positive solution b / v = 1 − R T b / ( 2 a ) {\displaystyle b/v=1-{\sqrt {RTb/(2a)}}} which, for b / v = 0 {\displaystyle b/v=0 ...

  8. Hosmer–Lemeshow test - Wikipedia

    en.wikipedia.org/wiki/Hosmer–Lemeshow_test

    1 0 30 16 0.53 2 25 11 7 0.64 3 50 15 11 0.73 4 75 5 4 0.80 5 100 18 16 0.89 6 125 5 4 0.80 7 150 24 17 0.71 8 175 8 5 0.62 9 200 12 5 0.42 10 225 8 3 0.38 11 250 5 3 0.60 12 275 4 1 0.25 13 300 1 0 0.00 14 325 1 0 0.00 15 350 1 1 1.00 16 375 1 0 0.00 17 400 1 0 0.00 18 425 1 0 0.00 19 450 1 0 0.00 20 475 1 0 0.00 21 500 1 0 0.00

  9. Blood alcohol content - Wikipedia

    en.wikipedia.org/wiki/Blood_alcohol_content

    [1] BAC is expressed as mass of alcohol per volume of blood. In US and many international publications, BAC levels are written as a percentage such as 0.08%, i.e. there is 0.8 grams of alcohol per liter of blood. [1] [2] In different countries, the maximum permitted BAC when driving ranges from the limit of detection (zero tolerance) to 0.08% ...