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ANOVA

Wikipedia English The Free Encyclopedia

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Analysis of variance
Analysis of variance (ANOVA) is a collection of statistical models used to analyze the differences between group means and their associated procedures (such as "variation" among and between groups). In ANOVA setting, the observed variance in a particular variable is partitioned into components attributable to different sources of variation. In its simplest form, ANOVA provides a statistical test of whether or not the means of several groups are equal, and therefore generalizes the t-test to more than two groups. Doing multiple two-sample t-tests would result in an increased chance of committing a type I error. For this reason, ANOVAs are useful in comparing (testing) three or more means (groups or variables) for statistical significance.

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WordNet 2.0 Dictionary

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ANOVA

Noun
1. a statistical method for making simultaneous comparisons between two or more means; a statistical method that yields values that can be tested to determine whether a significant relation exists between variables
(synonym) analysis of variance
(hypernym) multivariate analysis
(classification) statistics


Raynet Business | Marketing Dictionary

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Analysis of Variance (ANOVA)
a  method of analysis for determining the level of statistical significance of differences among the means of two or more
 
Research Analysis of Variance (ANOVA)
a research statistical technique for examining the differences among means for two or more populations.

Copyright © 2001, Ray Wright

ISO Dictionary

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Analysis of variance (ANOVA)
A basic statistical technique for analyzing experimental data. It subdivides the total variation of a data set into meaningful component parts associated with specific sources of variation in order to test a hypothesis on the parameters of the model or to estimate variance components. There are three models: fixed, random and mixed.

Electronic Statistics Textbook Dictionary

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General ANOVA/MANOVA
The purpose of analysis of variance (ANOVA) is to test for significant differences between means by comparing (i.e., analyzing) variances. More specifically, by partitioning the total variation into different sources (associated with the different effects in the design), we are able to compare the variance due to the between-groups (or treatments) variability with that due to the within-group (treatment) variability. Under the null hypothesis (that there are no mean differences between groups or treatments in the population), the variance estimated from the within-group (treatment) variability should be about the same as the variance estimated from between-groups (treatments) variability.
For more information, see the ANOVA/MANOVA chapter.


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