An Insurance Company Conducted a Study to Determine the Percentage

Multiple Choice

An insurance company conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the previous four years. The sample was randomly chosen from a national directory of doctors. What is the variable of interest in this study?

A) the responses: have been sued/have not been sued for malpractice in the last four years
B) the doctor's area of expertise (i.e., cardiology, pediatrics, etc.)
C) the number of doctors who are cardiologists
D) all cardiologists in the directory