A researcher tests a new battery design by giving the new battery to one device and the old battery to another device, then measuring runtimes once each.
Which principle of experimental design is most violated?
- Acheck_circle
Replication
- B
Blinding
- C
Blocking
- D
Random assignment
Explanation
With only one observation per treatment, there is no way to estimate variability or confirm the effect. Replication (multiple experimental units per treatment) is essential.