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  2. Fold change - Wikipedia

    en.wikipedia.org/wiki/Fold_change

    Here, fold change is defined as the ratio of the difference between final value and the initial value divided by the initial value. For quantities A and B, the fold change is given as (B − A)/A, or equivalently B/A − 1. This formulation has appealing properties such as no change being equal to zero, a 100% increase is equal to 1, and a 100% ...

  3. Significant figures - Wikipedia

    en.wikipedia.org/wiki/Significant_figures

    The base-10 logarithm of a normalized number (i.e., a × 10 b with 1 ≤ a < 10 and b as an integer), is rounded such that its decimal part (called mantissa) has as many significant figures as the significant figures in the normalized number. log 10 (3.000 × 10 4) = log 10 (10 4) + log 10 (3.000) = 4.000000...

  4. Darcy friction factor formulae - Wikipedia

    en.wikipedia.org/wiki/Darcy_friction_factor_formulae

    Churchill equation [24] (1977) is the only equation that can be evaluated for very slow flow (Reynolds number < 1), but the Cheng (2008), [25] and Bellos et al. (2018) [8] equations also return an approximately correct value for friction factor in the laminar flow region (Reynolds number < 2300). All of the others are for transitional and ...

  5. List of countries by government budget - Wikipedia

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

    Global map of total central government revenues, as share of GDP, 2022 [1] Global map of total central government expenditures, as share of GDP, 2022 [2]. This is the list of countries by government budget.

  6. List of Asian countries by life expectancy - Wikipedia

    en.wikipedia.org/wiki/List_of_Asian_countries_by...

    Estimation of the World Bank Group for 2022. [2] [3] [4] The data is filtered according to the list of countries in Asia.The values in the World Bank Group tables are rounded

  7. List of countries by traffic-related death rate - Wikipedia

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

    This list of countries by traffic-related death rate shows the annual number of road fatalities per capita per year, per number of motor vehicles, and per vehicle-km in some countries in the year the data was collected.

  8. Normal distribution - Wikipedia

    en.wikipedia.org/wiki/Normal_distribution

    Such variables may be better described by other distributions, such as the log-normal distribution or the Pareto distribution. The value of the normal density is practically zero when the value ⁠ x {\displaystyle x} ⁠ lies more than a few standard deviations away from the mean (e.g., a spread of three standard deviations covers all but 0.27 ...

  9. List of countries by current account balance as percentage of ...

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

    Quartile representation of current account balance as percent GDP by IMF WEO data Quartile representation of current account balance as percent GDP by CIA World ...