2.11 A research study estimated that under a certain condition, the probability that a subject would be referred for heart catheterization was 0.906 for whites and 0.847 for blacks.

a. A press release about the study stated that the odds of referral for cardiac catheter-

ization for blacks are 60% of the odds for whites. Explain how they obtained 60%

(more accurately, 57%).

b. An Associated Press story later described the study and said "Doctors were only 60% as likely to order cardiac catheterization for blacks as for whites."

Explain what is wrong with this interpretation. Give the correct percentage for this interpretation.