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  2. Homogeneity and heterogeneity - Wikipedia

    en.wikipedia.org/wiki/Homogeneity_and_heterogeneity

    Homogeneity and heterogeneity; only ' b ' is homogeneous Homogeneity and heterogeneity are concepts relating to the uniformity of a substance, process or image.A homogeneous feature is uniform in composition or character (i.e., color, shape, size, weight, height, distribution, texture, language, income, disease, temperature, radioactivity, architectural design, etc.); one that is heterogeneous ...

  3. Homogeneity and heterogeneity (statistics) - Wikipedia

    en.wikipedia.org/wiki/Homogeneity_and...

    There are then questions as to whether, if the records are combined to form a single longer set of records, those records can be considered homogeneous over time. An example of homogeneity testing of wind speed and direction data can be found in Romanić et al., 2015. [9]

  4. Homoscedasticity and heteroscedasticity - Wikipedia

    en.wikipedia.org/wiki/Homoscedasticity_and...

    Consider the linear regression equation = +, =, …,, where the dependent random variable equals the deterministic variable times coefficient plus a random disturbance term that has mean zero. The disturbances are homoscedastic if the variance of ε i {\displaystyle \varepsilon _{i}} is a constant σ 2 {\displaystyle \sigma ^{2}} ; otherwise ...

  5. Market structure - Wikipedia

    en.wikipedia.org/wiki/Market_structure

    Market definition is an important issue for regulators facing changes in market structure, which needs to be determined. [1] The relationship between buyers and sellers as the main body of the market includes three situations: the relationship between sellers (enterprises and enterprises), the relationship between buyers (enterprises or ...

  6. Homogeneity (semantics) - Wikipedia

    en.wikipedia.org/wiki/Homogeneity_(semantics)

    In formal semantics, homogeneity is the phenomenon where plural expressions that seem to mean "all" negate to "none" rather than "not all". For example, the English sentence "Robin read the books" requires Robin to have read all of the books, while "Robin didn't read the books" requires her to have read none of them. Neither sentence is true if ...

  7. Study heterogeneity - Wikipedia

    en.wikipedia.org/wiki/Study_heterogeneity

    Statistical testing for a non-zero heterogeneity variance is often done based on Cochran's Q [13] or related test procedures. This common procedure however is questionable for several reasons, namely, the low power of such tests [14] especially in the very common case of only few estimates being combined in the analysis, [15] [7] as well as the specification of homogeneity as the null ...

  8. Glossary of literary terms - Wikipedia

    en.wikipedia.org/wiki/Glossary_of_literary_terms

    Also apophthegm. A terse, pithy saying, akin to a proverb, maxim, or aphorism. aposiopesis A rhetorical device in which speech is broken off abruptly and the sentence is left unfinished. apostrophe A figure of speech in which a speaker breaks off from addressing the audience (e.g., in a play) and directs speech to a third party such as an opposing litigant or some other individual, sometimes ...

  9. List of writing genres - Wikipedia

    en.wikipedia.org/wiki/List_of_writing_genres

    Apocalyptic literature – details the authors' visions of the end times as revealed by an angel or other heavenly messenger. [18] Bildungsroman – "coming of age" story. The German word "Bildung" can mean both "education" and "self-development." Crime fiction. Campus murder mystery; Historical fiction. Biographical novel; Historical romance [19]