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    Correlation versus Causation

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    One of the most common errors in health-related studies is the confusion between correlation and causation.

    Why is the above statement true? Can you give me an example to help me understand this?

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    Solution Preview

    When two variables are correlated, that means that a change in one is associated with a change in the other. This does not mean that one variable causes the other.

    In the last posting (posting 100984), I said that there was a positive correlation between teenage obesity and tv watching. This could be a causal ...

    Solution Summary

    The solution discusses the confusion between correlation and causation.