The partition of variability is based on the idea that the deviation of each score from the Grand mean is made up of two parts; the deviation of each score from its group mean and the deviation of the other scores in the group from the group mean.

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The partition of variability is based on the idea that the deviation of each score from the Grand mean is made up of two parts; the deviation of the group mean from the Grand mean (between-group variability) and the deviation of each score from its group mean (within-group variability).

The Partition of Variability Is Based on the Idea That