Which experimental design means that two groups of test units were randomly assigned to two different treatment groups at the same time,and the dependent variable was measured in the two groups simultaneously?
A) R X₁ O₁ R X₂ O₂
B) R X₁ O₁ O₂ X₂ O₂
C) X O₁ O₂ X O₁ O₂
D) R X₁ O₁ R X₁ O₁

Question

Quizplus · Accepted Answer

This design represents a randomized controlled trial where two groups are randomly assigned to different treatments (X₁ and X₂) and the outcome (O₁ and O₂) is measured simultaneously.

Which Experimental Design Means That Two Groups of Test Units