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9.4: Chapter 9 Key Terms

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    79084
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    Analysis of Variance

    also referred to as ANOVA, is a method of testing whether or not the means of three or more populations are equal. The method is applicable if:

    • all populations of interest are normally distributed.
    • the populations have equal standard deviations.
    • samples (not necessarily of the same size) are randomly and independently selected from each population.

    The test statistic for analysis of variance is the \(F\)-ratio.

    Between-Groups Variance

    an estimate of the average variance among sample means (i.e., from the different groups) across all of the groups.

    One-Way ANOVA

    an analysis of variance with one independent (grouping) variable.

    Within-Groups Variance

    an estimate of the average of the sample variances (i.e., within the different groups) across all of the groups.


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