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Suppose a study finds that the correlation coefficient relating family income and SAT scores is r = +0.98. Which of the following are proper conclusions?
I. Poverty causes low SAT scores

II. Wealth causes high SAT scores

III. There is a very strong association between family income and SAT scores

I only

II only

III only

I and II only

II and III only

  • Statistics - ,

    III only. Correlation coefficients do not indicate causality, only a relationship.

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