Researchers Investigated Whether Larger Bowls Increase the Mean Amount of Ice

Multiple Choice

Researchers investigated whether larger bowls increase the mean amount of ice cream people scoop when serving themselves. In a sample of volunteers, participants were ran-domly given either a small (17 oz.) bowl or a large (34 oz.) bowl. They were then invited to scoop as much ice cream as they liked, and the amount of ice cream (in ounces) was measured. The mean amount of ice cream for the participants given a small bowl was 6.43 ounces; the mean amount of ice cream for the participants given a large bowl was 8.15 ounces.
-What are the observational units?

A) Ice cream scoops
B) Participants
C) Researchers
D) Ounces