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  2. Felicific calculus - Wikipedia

    en.wikipedia.org/wiki/Felicific_calculus

    Hedonimetry is the study of happiness ("experienced utility" [3]) as a measurable economic asset. The first major work in the field was an 1881 publication of Mathematical Psychics by the famous statistician and economist Francis Ysidro Edgeworth , who hypothesized a way of measuring happiness in units.

  3. Psychological statistics - Wikipedia

    en.wikipedia.org/wiki/Psychological_statistics

    Psychological statistics is application of formulas, theorems, numbers and laws to psychology. Statistical methods for psychology include development and application statistical theory and methods for modeling psychological data. These methods include psychometrics, factor analysis, experimental designs, and Bayesian statistics. The article ...

  4. Frequency (statistics) - Wikipedia

    en.wikipedia.org/wiki/Frequency_(statistics)

    The cumulative frequency is the total of the absolute frequencies of all events at or below a certain point in an ordered list of events. [1]: 17–19 The relative frequency (or empirical probability) of an event is the absolute frequency normalized by the total number of events:

  5. Expected utility hypothesis - Wikipedia

    en.wikipedia.org/wiki/Expected_utility_hypothesis

    The summarised formula for expected utility is () = where is the probability that outcome indexed by with payoff is realized, and function u expresses the utility of each respective payoff. [1] Graphically the curvature of the u function captures the agent's risk attitude.

  6. Debt ratio - Wikipedia

    en.wikipedia.org/wiki/Debt_ratio

    The debt ratio or debt to assets ratio is a financial ratio which indicates the percentage of a company's assets which are funded by debt. [1] It is measured as the ratio of total debt to total assets, which is also equal to the ratio of total liabilities and total assets:

  7. Classical test theory - Wikipedia

    en.wikipedia.org/wiki/Classical_test_theory

    The item-total correlation provides an index of the discrimination or differentiating power of the item, and is typically referred to as item discrimination. In addition, these statistics are calculated for each response of the oft-used multiple choice item, which are used to evaluate items and diagnose possible issues, such as a confusing ...

  8. Kuder–Richardson formulas - Wikipedia

    en.wikipedia.org/wiki/Kuder–Richardson_formulas

    The name of this formula stems from the fact that is the twentieth formula discussed in Kuder and Richardson's seminal paper on test reliability. [1] It is a special case of Cronbach's α, computed for dichotomous scores. [2] [3] It is often claimed that a high KR-20 coefficient (e.g., > 0.90) indicates a homogeneous test. However, like ...

  9. Law of total probability - Wikipedia

    en.wikipedia.org/wiki/Law_of_total_probability

    The term law of total probability is sometimes taken to mean the law of alternatives, which is a special case of the law of total probability applying to discrete random variables. [ citation needed ] One author uses the terminology of the "Rule of Average Conditional Probabilities", [ 4 ] while another refers to it as the "continuous law of ...