Information and IdeasVery hardChoosing the claim that the rates support
Information and Ideas practice question
Two hospitals' surgery outcomes last year:
Hospital A: 2,000 operations, 40 complications
Hospital B: 500 operations, 15 complications
Which statement is best supported by the data?
- A. Hospital A had more complications in total, but Hospital B's complication rate was higher.Correct
- B. Hospital A's complication rate was higher than Hospital B's.
- C. Hospital B performed more operations than Hospital A.
- D. The two hospitals had the same complication rate.
Answer: A. Hospital A had more complications in total, but Hospital B's complication rate was higher.
Totals: A's 40 exceeds B's 15. Rates: A had 40/2,000 = 2%; B had 15/500 = 3%. More complications at A, a higher rate at B.
Why the other answers are wrong
- B. Hospital A's complication rate was higher than Hospital B's.
- A's rate is 2%, below B's 3%.
- C. Hospital B performed more operations than Hospital A.
- A performed 2,000 operations to B's 500.
- D. The two hospitals had the same complication rate.
- 2% and 3% differ.
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