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8. Researcher Thomas notices that people who were vaccinated had low COVID-19 risk than those who were not vaccinated. Based on this observation, what is

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8. Researcher Thomas notices that people who were vaccinated had low COVID-19 risk than those who were not vaccinated. Based on this observation, what is the best description of the relationship between vaccine and risk of COVID-19? a) Circle your answer: Causal relationship No correlation Positive correlation Negative correlation Cannot be determined from the information provided a) Suppose that Thomas's data gives r = -0.8741. Does correlation imply causation

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