Question: To study whether there is a correlation between playing a musical instrument and grades, a teacher randomly selected 20 students who play an instrument and

To study whether there is a correlation between playing a musical instrument and grades, a teacher randomly selected 20 students who play an instrument and 20 students who do not play an instrument, and compared their grades. Is the study observational or experimental? If it is an experiment, what is the controlled factor? Select the correct answer below: The study is an experiment. The controlled factor is playing a musical instrument. O The study is an experiment. The controlled factor is the survey. The study is an experiment. The controlled factor is a student's grades. O The study is an observational study. vious

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