Page "Analysis of variance" Paragraph 88
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Kempthorne uses the randomization-distribution and the assumption of unit treatment additivity to produce a derived linear model, very similar to the textbook model discussed previously.
The test statistics of this derived linear model are closely approximated by the test statistics of an appropriate normal linear model, according to approximation theorems and simulation studies.
For example, the randomization-based analysis results in a small but ( strictly ) negative correlation between the observations.
In the randomization-based analysis, there is no assumption of a normal distribution and certainly no assumption of independence.
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