1 Recall that in analytical surveys, the factor levels cannot be assigned to units (e.g. CHAPTER 9. TWO FACTOR DESIGNS – SINGLE-SIZED EXPERIMENTAL UNITS – CR AND RCB DESIGNS examine only factorial treatment structures, i.e. every treatment combination appears somewhere in the experiment.
For example, if Factor A has 2 levels, and Factor B has 3 levels, then all 6 treatment combinations appear in the experiment. Why factorial designs? Why do we insist on factorial treatment structures?
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