Determine whether the study depicts an observational study or an experiment. forty people are divided into two groups. forty people are divided into two groups. one group is exposed to atonal classical music exposed to atonal classical music. the other is not. after one monthone month, both groups are questioned about their ability to remember random phrases ability to remember random phrases. is the study an observational study or an experiment

This is an "experiment" on the grounds that the one who is researching controls one variable to decide the impact on the response variable.  

Experimental studies are the ones in which the specialist controls study factors or subjects. These examinations are ones where specialists present an intercession and observe the impacts. Experimental studies are generally randomized, which means the subjects are assembled by chance. Randomized controlled trial (RCT).

answer; (you have the right of way);

a) which ethnic groups live in this community?

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