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The key difference between experimental and observational study is that an experimental study is a study where the researcher has control over most of the variables. On the other hand, an observation study is a study where the researcher merely observes the subject without controlling any variables.
In this lesson, you will learn about experimental and observational studies and how they both use statistics. First, you will need to understand two types of variables that occur in both - response and explanatory - as well as the more familiar independent and dependent variables.