실험군이 · 실험군을
experimental group, treatment group
Example
실험군의 결과가 대조군보다 훨씬 좋았어요.
The experimental group's results were much better than the control group's.
Word parts
실 real+험 test+군 group
Literally 'experiment group': 실험 + -군 (group).
Good to know
-군 is a reusable research suffix: 실험군, 대조군, 고위험군 (high-risk group).
Related words