The correlation coefficient for poor health and not exercising in a group of people is 0.67. Analyze the following statement:
Poor health is caused by not exercising.
Is this a reasonable conclusion?
Yes; everyone who doesn't exercise is by definition unhealthy
Yes; the correlation coefficient is above 0.5, so that implies causation
No; the data are only weakly correlated, and many people are healthy who don't exercise
No; poor health and not exercising are completely unrelated
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