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  2. 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 ...

  3. Imperial units - Wikipedia

    en.wikipedia.org/wiki/Imperial_units

    The Weights and Measures Act 1824 was initially scheduled to go into effect on 1 May 1825. [4] The Weights and Measures Act 1825 pushed back the date to 1 January 1826. [5] The 1824 act allowed the continued use of pre-imperial units provided that they were customary, widely known, and clearly marked with imperial equivalents.

  4. Probability of superiority - Wikipedia

    en.wikipedia.org/wiki/Probability_of_superiority

    In other words, the correlation is the difference between the common language effect size and its complement. For example, if the common language effect size is 60%, then the rank-biserial r equals 60% minus 40%, or r = 0.20. The Kerby formula is directional, with positive values indicating that the results support the hypothesis.

  5. Name-letter effect - Wikipedia

    en.wikipedia.org/wiki/Name-letter_effect

    The name-letter effect is the tendency of people to prefer the letters in their name over other letters in the alphabet.Whether subjects are asked to rank all letters of the alphabet, rate each of the letters, choose the letter they prefer out of a set of two, or pick a small set of letters they most prefer, on average people consistently like the letters in their own name the most.

  6. Category:Effect size - Wikipedia

    en.wikipedia.org/wiki/Category:Effect_size

    Pages in category "Effect size" The following 6 pages are in this category, out of 6 total. This list may not reflect recent changes. ...

  7. Sample size determination - Wikipedia

    en.wikipedia.org/wiki/Sample_size_determination

    The sample size is an important feature of any empirical study in which the goal is to make inferences about a population from a sample. In practice, the sample size used in a study is usually determined based on the cost, time, or convenience of collecting the data, and the need for it to offer sufficient statistical power. In complex studies ...

  8. Difference in differences - Wikipedia

    en.wikipedia.org/wiki/Difference_in_differences

    Difference in differences (DID [1] or DD [2]) is a statistical technique used in econometrics and quantitative research in the social sciences that attempts to mimic an experimental research design using observational study data, by studying the differential effect of a treatment on a 'treatment group' versus a 'control group' in a natural experiment. [3]

  9. Transgender legal history in the United States - Wikipedia

    en.wikipedia.org/wiki/Transgender_legal_history...

    The suit asks the court to prevent the ban from going into effect. [102] [103] Two major LGBT-rights organizations filed a petition in the United States District Court in Washington on behalf of the five transgender personnel. [103] On August 28, 2017, the American Civil Liberties Union (ACLU) of Maryland filed a federal lawsuit, Stone v.