The tables below summarize the surgery survival rate for two hospitals, grouped according to patient condition prior to surgery.
What is the weighted average (Y) of the logs of the estimated odds ratios for the two tables? Report the number to the nearest hundredth decimal place.
Good Condition Poor Condition
Survived Died Survived Died
Hospital A 590 10 Hospital A 210 190
Hospital B 870 30 Hospital B 30 70