Analysis of Variance (ANOVA)

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A statistical analysis tool that separates the total variability found within a data set into two components: systematic and random factors. Random factors are independent of the data while systematic factors are dependent upon the data set.  The ANOVA test is used to determine the impact independent variables have on the dependent variable in a regression analysis.  Types of ANOVA tests include one-way analysis of variance and two-way analysis of variance.