## Regression--treatments from an otherwise continuous range of values applied to a CRD.Note: this is a simple arrangement of treatments that could be found in almost any other experimental design. See arrangements versus design.
- Treatments are specific quantities from an otherwise continuous range of values. For example 0, 2, 5, 10 kg of fertilizer per experimental subject.
- Replications of treatments are assigned completely at random to independent experimental subjects.
- Adjacent subjects could potentially have the same treatment.
5a 2a 0a 5b 1a 5c 1b 0b 2b 1c 0c 2c 0d 5d 2d 1d
PROC GLM; MODEL Y = X / SOLUTION; RUN; Note: the SOLUTION option returns the regression line parameters.
- Complete Randomized Design (CRD): treatments come from a discrete qualitative set
- Regression--comparing trends from different treatmentsa set of quantitative treatments is crossed on a set of qualitiative treatments.
- RCB repeated in time a set of treatments is repeated in time.
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