Tell whether the study is an experimental study or an observational study. You want to study the effects of regular exercise on a person's heart rate. You measure the heart rate of a person at rest and again after jogging in place for 5 minutes. The control group is every other student who enters the room. The experimental group is those students who are not in the control group. O Observational, since the assignment of individuals to the experimental and control groups was done randomly by you. 0 Experimental, since the assignment of individuals to the experimental and control groups was done randomly by you. A, Observational, you are watching (observing) what happens to the heart rate of the students. A Experimental, you are experimenting on the students to obtain their heart rates