Question

a scientist measures the heart rates of 30 students from the same class before and after they run for different amounts of time. the experimental set up is shown below: group 1 had ten students who ran one lap. group 2 had ten students who did not run at all. group 3 had ten students who ran two laps. group 4 had 30 students from another class whose heart rates were not measured. which group is the control group in this experiment? group 1 from this class group 3 from this class group 2 from this class group 4 from another class

Explanation:

A control group in an experiment is the group that does not receive the treatment (in this case, running). Group 2 did not run at all, serving as a baseline for comparison with the running - groups.

Answer:

C. Group 2 from this class