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Explaining Correlation

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What does it mean to say that a correlation is "strong?" How can we assess the strength of a correlation by looking at a scatter graph of the data?

A "strong" correlation is a relative term and depends on the field of study. All things being equal, correlation values above 0.90 or -0.90 can be described as "strong." Again, the choice of these two values would depend on the study. The strength of the correlation increases as the value approaches 1 or -1.

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A "strong" correlation is a relative term and depends on the field of study. All things being equal, correlation values above 0.90 or -0.90 can be described as ...

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