- The air filter doubles the risk of lung cancer.
- The air filter halves the risk of lung cancer.
- The air filter has no effect on lung cancer risk.
- The air filter increases the risk of lung cancer by 50%.
2. A study calculates a Relative Risk (RR) of 0.5 for lung cancer in individuals exposed to a new air filter compared to an unexposed group. What is the technical interpretation of this finding?
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