• The test statistic for analysis of variance is the $$F$$-ratio.
• The test statistic for analysis of variance is the $$F$$-ratio.
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.