Indicate whether the following study is an observational study or a controlled experiment. A researcher is interested in the eff
ect of music on memory. She randomly divides a group of students into three groups: those who will listen to quiet music, those who will listen to loud music, and those who will not listen to music. After the appropriate music is played (or not played), she gives all the students a memory test.
Based on the information provided in the equation, it can be inferred that the researcher is conducting a controlled experiment. The aim of the research studies will be to investigate the effects of music such as classic and other styles of music on the accumulation of students while studying. The results can be used to make a conclusive summary of the effects of music while studying.
