APFIVE Experimental Design With Blocking
A researcher wants to study the effect of three different teaching methods on student performance. The researcher has 60 students available and wants to control for potential confounding variables such as prior knowledge. Which experimental design is most appropriate?
A
Observational study with stratified sampling
B
Randomized block design with blocking by pretest scores
C
Matched pairs design with three treatments
D
Completely randomized design without blocking
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