# 9.8: Chapter 12 Key Terms


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:
• The test statistic for analysis of variance is the $$F$$-ratio.
One-Way ANOVA
a method of testing whether or not the means of three or more populations are equal; the method is applicable if:
• The test statistic for analysis of variance is the $$F$$-ratio.
Variance
mean of the squared deviations from the mean; the square of the standard deviation. For a set of data, a deviation can be represented as $$x – \overline{x}$$ where $$x$$ is a value of the data and $$\overline{x}$$ is the sample mean. The sample variance is equal to the sum of the squares of the deviations divided by the difference of the sample size and one.

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