noun
experimental group
Used in scientific or statistical contexts to refer to the group that receives the treatment or intervention, as opposed to the control group.
実験群と対照群の結果を比較した。
We compared the results of the experimental group and the control group.
対照群 is the control group, which does not receive the experimental treatment, while 実験群 is the group that does.
Compound of 実験 (experiment) and 群 (group).