(solution) A spouse can go to one of two local hospitals for heart

(solution) A spouse can go to one of two local hospitals for heart

Review attachment and answer question

 Which hospital  is superior in cardiac surgery? Explain

A spouse can go to one of two local hospitals for heart surgery.
Checking the history for the past year, you find that each of the two hospitals has performed cardiac
surgery on 1000 patients. In hospital A 710 patients survived (71%). In hospital B 540 (54%) survived.
Based on the numbers presented, which hospital do you think is superior in cardiac surgery?
Surely hospital A is better, right?
Now, let?s look at more data. The below chart summarizes three categories of patients (those entering in
fair, serious and critical condition) and the survival rate from surgery (in percent) for the two local
hospitals.
Patient Entering
Condition
Fair
Serious
Critical
Total Hospital A Hospital B 700
200
100
1000 100
200
700
1000 Survivors from A
(# and percent)
600 or 86%
100 or 50%
10 or 10%
710 or 71% Survivors from B
(# and percent)
90 or 90%
150 or 75%
300 or 43%
540 or 54% Looking at the data broken down in this way, we see that Hospital B has a higher success rate in all three
categories of patients but when averaged all together, Hospital A has the higher overall survival rate.
Based on the numbers presented, which hospital do you think is superior in cardiac surgery?