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What is the "sources of variance" in the Independent Measures Analysis of Variance. Why are the...

What is the "sources of variance" in the Independent Measures Analysis of Variance. Why are the scores different between the treatments, and why are the scores different within each treatment?

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In a one-way ANOVA, the variation in a response variable due to two sources: 1. One source is that the k levels of a factor (groups) may be different. The variation caused by this source is called between-group variability. ... The variation caused by this source is termed within-group variability.

scores different between the treatments: different treatments will vary

scores different within each treatment:Repeated measurements on the same individual may vary because of changes in the variable being measured.

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