Consider this scenario: Surgery patients in Hospital A and Hospital B are classified as being in either good condition or poor condition. When looking separately at survival rates among patients in good conduction and in poor condition, Hospital B has higher rates for both groups. Yet when the two groups are combined, Hospital A has a higher rate. What's the most likely lurking variable? O The amount of food eaten by the patients O Which hospital O Survival rates The number of patients in good or poor condition The skill of the surgical staff

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A: mean  Median

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A:

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A: