% Tell whether the study is an experimental study or an observational study. You want to study the effects that music has on the ability to recall knowledge. Each individual in your study is given material to read on the same unfamiliar topic and then asked to take a factual quiz on the material. The control group is individuals who do not volunteer to be part of the study. The experimental group is individuals who volunteer to be part of the study. C Observational, since the assignment of groups is beyond your control. C Experimental, since the assignment of groups is beyond your control. C Observational, you are watching (observing) what happens to the scores on the quiz. C Experimental, you are experimenting on the students to obtain the effect of classical music