ANOVA is a statistical approach that assesses potential distinctions in a scale-level dependent variable by a nominal-level variable having actually 2 or more categories. For example, an ANOVA can study potential differences in IQ scores by Country (US vs. Canada vs. Italy vs. Spain). Developed by Ronald Fisher in 1918, this test extends the t and also thez test which have theproblem of only allowing the nominal level variable to have actually two categories. This test is additionally dubbed the Fisher evaluation of variance.

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The use of ANOVA counts on the research design. Commonly, ANOVAs are supplied in three ways: one-means ANOVA, two-way ANOVA, and also N-method ANOVA.


Wideal, D. B. (2006). Comparing teams in a before-after design: When t test and ANCOVA develop various results. British Journal of Educational Psychology, 76, 663-675.

To Reference this Page: Statistics Solutions. (2013). ANOVA .

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