Three-variable research problem

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Give a plausible example of a three-variable research problem in which partial correlation would be a useful analysis. Define X1, X2, and Y. Make sure that you indicate which of your three variables is the “controlled for” variable ( X2).  What results might you expect to obtain for this partial correlation,  and how would you interpret your results (e.g., spurious correlation,  mediation, moderation, and so on)? 600 words

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