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11. In a cross-sectional study, the investigator measures the exposure and the outcome at the same...

11. In a cross-sectional study, the investigator measures the exposure and the outcome at the same time in a sample of individuals. The following data are from a hypothetical cross-sectional study that tested the hypothesis that persons who engage in recreational physical activity are less likely to have trouble sleeping.
Trouble sleeping (% yes)
​Recreational physical activity:​
Yes​ 20%
​No​ 40%
What conclusions can you draw from these results about the association between recreational physical activity and trouble sleeping? Please justify your answer. (10 pts)
math   Statistics-And-Probability   
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