Which Experimental Design Means That Two Groups of Test Units

question 43

Multiple Choice

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

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