Experts agreed that the cardiologist made few obvious mistakes in reading and interpreting the EKG data. The cardiologist in the study was unrepresentative of cardiologists in general with respect to skill and experience. The cardiologist correctly diagnosed a significantly higher proportion of the cases in which no heart attack occurred than did the computer program. In a considerable percentage of cases, EKG data alone are insufficient to enable either computer programs or cardiologists to make accurate diagnoses.
When people show signs of having a heart attack an electrocardiograph (EKG) is often used to diagnose their condition. In a study, a computer program for EKG diagnosis of heart attacks was pitted against a very experienced, highly skilled cardiologist. The program correctly diagnosed a significantly higher proportion of the cases that were later confirmed to be heart attacks than did the cardiologist. Interpreting EKG data, ttherefore, should be left to computer programs.
Which one of the following, if true, most weakens the argument?