Designing Experiments 

Population

________: subjects must be randomly selected.

Evidence of causation

________ can only be given if there is proof that the only explanation for results is random choice.

Blocks

________ are organized like strata (similar within and different between)

Double Blind

________: Neither the subjects nor the researchers knows what treatment the subject is receiving (ensures equal treatment)

Randomized Complete Block Design

first separated into blocks, then assign treatments

Matched Pairs Design

two treatments, grouped into pairs based on some blocking variable

Double Blind

Neither the subjects nor the researchers knows what treatment the subject is receiving (ensures equal treatment)

Single Blind

One party knows, other doesnt

Population

subjects must be randomly selected

Cause and Effect

treatment must be randomly assigned