The legal profession conducted a study to determine the percentage of cardiologists who had been sued for malpractice in the last five years. the sample was randomly chosen from a national directory of doctors. identify the individuals in the study.
a) each cardiologist selected from the directory
b) the responses: have been sued/have not been sued for malpractice in the last five years
c) the doctorʹs area of expertise (i. e., cardiology, pediatrics, etc.)
d) all cardiologists in the directory