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  2. 68–95–99.7 rule - Wikipedia

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

    In statistics, the 68–95–99.7 rule, also known as the empirical rule, and sometimes abbreviated 3sr, is a shorthand used to remember the percentage of values that lie within an interval estimate in a normal distribution: approximately 68%, 95%, and 99.7% of the values lie within one, two, and three standard deviations of the mean, respectively.

  3. Kelly criterion - Wikipedia

    en.wikipedia.org/wiki/Kelly_criterion

    Example of the optimal Kelly betting fraction, versus expected return of other fractional bets. In probability theory, the Kelly criterion (or Kelly strategy or Kelly bet) is a formula for sizing a sequence of bets by maximizing the long-term expected value of the logarithm of wealth, which is equivalent to maximizing the long-term expected geometric growth rate.

  4. Sahm rule - Wikipedia

    en.wikipedia.org/wiki/Sahm_rule

    Sahm rule 1949-2024. In macroeconomics, the Sahm rule, or Sahm rule recession indicator, is a heuristic measure by the United States' Federal Reserve for determining when an economy has entered a recession. [1] It is useful in real-time evaluation of the business cycle and relies on monthly unemployment data from the Bureau of Labor Statistics ...

  5. Quartile - Wikipedia

    en.wikipedia.org/wiki/Quartile

    The QUARTILE function is a legacy function from Excel 2007 or earlier, giving the same output of the function QUARTILE.INC. In the function, array is the dataset of numbers that is being analyzed and quart is any of the following 5 values depending on which quartile is being calculated.

  6. Truncated mean - Wikipedia

    en.wikipedia.org/wiki/Truncated_mean

    The scoring method used in many sports that are evaluated by a panel of judges is a truncated mean: discard the lowest and the highest scores; calculate the mean value of the remaining scores. [ 10 ] The Libor benchmark interest rate is calculated as a trimmed mean: given 18 responses, the top 4 and bottom 4 are discarded, and the remaining 10 ...

  7. Pareto principle - Wikipedia

    en.wikipedia.org/wiki/Pareto_principle

    The Pareto principle may apply to fundraising, i.e. 20% of the donors contributing towards 80% of the total. The Pareto principle (also known as the 80/20 rule, the law of the vital few and the principle of factor sparsity [1] [2]) states that for many outcomes, roughly 80% of consequences come from 20% of causes (the "vital few").

  8. Health Star Rating System - Wikipedia

    en.wikipedia.org/wiki/Health_Star_Rating_System

    The calculator is available in two formats—an online forum and a Microsoft Excel spreadsheet. [23] Both of these calculators are available for use on the official Health Star Rating website and is accessible to anyone. The Guide for Industry for the Health Star Rating Calculator outlines the steps required in evaluating a products score. [25]

  9. Debt-to-income ratio - Wikipedia

    en.wikipedia.org/wiki/Debt-to-income_ratio

    The two main kinds of DTI are expressed as a pair using the notation / (for example, 28/36).. The first DTI, known as the front-end ratio, indicates the percentage of income that goes toward housing costs, which for renters is the rent amount and for homeowners is PITI (mortgage principal and interest, mortgage insurance premium [when applicable], hazard insurance premium, property taxes, and ...