Each person was randomly assigned to one of two groups.

They were randomly assigned to one of three treatment groups.

In the study, patients were randomly assigned to four groups.

Participants were randomly assigned to a room either by themselves or with 3 other people.

Participants in the study were randomly assigned to one of four arms.

They were randomly assigned to one of two treatment strategies.

Next, the researchers randomly assigned the students to play one of two video games for four to six weeks.

Fifty patients were randomly assigned to one of two groups.

The investigators randomly assigned each couple to either one of two study groups.

If a woman is randomly assigned to conventional care, her company would pay.