Within-group sum of squares is the amount of variation that exists for all cases in a sample relative to their sub-group means.

Name: Within-group sum of squares is the amount of variation that exists for all cases in a sample relative to their sub-group means.
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Within-group sum of squares measures the variation within each subgroup, indicating how much individual data points deviate from their respective subgroup means.

Within-Group Sum of Squares Is the Amount of Variation That