nested model

(noun)

statistical model of parameters that vary at more than one level

Related Terms

Examples of nested model in the following topics:

  • Comparing Nested Models

    • Multilevel (nested) models are appropriate for research designs where data for participants are organized at more than one level.
    • Multilevel models, or nested models, are statistical models of parameters that vary at more than one level.
    • Multilevel models are particularly appropriate for research designs where data for participants are organized at more than one level (i.e., nested data).
    • Multilevel models have the same assumptions as other major general linear models, but some of the assumptions are modified for the hierarchical nature of the design (i.e., nested data).
    • In organizational psychology research, data from individuals must often be nested within teams or other functional units.

  • The F-Test

    • It is most often used when comparing statistical models that have been fitted to a data set, in order to identify the model that best fits the population from which the data were sampled.
    • Exact F-tests mainly arise when the models have been fitted to the data using least squares.
    • The hypothesis that a proposed regression model fits the data well (lack-of-fit sum of squares).
    • The hypothesis that a data set in a regression analysis follows the simpler of two proposed linear models that are nested within each other.

  • Setting Objectives

    • One model of organizing objectives uses hierarchies.
    • "Goal hierarchy" consists of the nesting of one or more goals within other goal(s).
    • In this model, one can expect to attain short-term goals fairly easily: they stand just slightly above one's reach.

  • Logistic Population Growth

    • To model the reality of limited resources, population ecologists developed the logistic growth model.
    • Thus, the exponential growth model is restricted by this factor to generate the logistic growth equation:
    • This model also allows for negative population growth or a population decline.
    • For plants, the amount of water, sunlight, nutrients, and the space to grow are the important resources, whereas in animals, important resources include food, water, shelter, nesting space, and mates.
    • Still, even with this oscillation, the logistic model is confirmed.

  • Symbiosis

    • Birds nesting in trees provide an example of a commensal relationship.
    • The tree is not harmed by the presence of the nest among its branches.
    • The nests are light and produce little strain on the structural integrity of the branch.
    • If the bird had to nest in the open, its eggs and young would be vulnerable to predators.
    • The southern masked-weaver bird is starting to make a nest in a tree in Zambezi Valley, Zambia.

  • Boranes: Boron-Hydrogen Compounds

    • nido- (from the Latin for "nest") B occupies n vertices of an n+1 deltahedron (e.g., B5H9 an octahedron missing one vertex)

  • Understanding Entailments of Realizations

    • Realizations, by their nature, carry with them a series of nested consequences, due to the nested and axiomatic system that builds contemporary mathematical curriculum.

  • Modality and levels of analysis

    • The network analyst tends to see individual people nested within networks of face-to-face relations with other persons.
    • Individuals in their work relations may be seen as nested within organizations; in their leisure relations they may be nested in voluntary associations.
    • And, as social entities, they may form ties with the individuals nested within them, and with other social entities.
    • Statistical analysts deal with the same issues as "hierarchical" or "nested" designs.

  • Setting Objectives and Standards

    • One model of organizing objectives uses hierarchies.
    • Goal hierarchy consists of the nesting of one or more goals within other, compatible goals.
    • In this model, one can expect to attain short-term goals fairly easily: they stand just slightly out of reach.

  • Quorum Sensing

    • In similar fashion, some social insects use quorum sensing to determine where to nest.
    • Many bacterial species, including E. coli, an enteric bacterium and model organism for Gram-negative bacteria, produce AI-2.