controls, sampling, replication, safety, and research ethics
WORKED SOURCEWORKED SOURCERandomize and control
Sixty plants are blocked by initial height, then randomly assigned within blocks to fertilizer or control; assessor is blinded.
- Blocking balances a strong covariate; randomization supports causality.
- Trace the worked reasoning before selecting the conclusion.
Which design feature does what?
MODELMethod Integrity Plan
LAB
PROVEChoose with evidence
CLUEPause. Find what matters. Then make your move.