Question

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?



The amount of food eaten by the patients

Which hospital

Survival rates

The number of patients in good or poor condition

The skill of the surgical staff

Answer 1

Hey there!
You probably didn't notice but you posted your question in Mathematics section. Please post your questions in relevant sections, in this way you'll also get help faster. Posting questions in irrelevant sections is considered as spamming.
Thank you.

Answer 2

@Abhisar its a stats question

Answer 3

@jim_thompson5910