A Certain HMO Is Attempting to Show the Benefits of Managed

A certain HMO is attempting to show the benefits of managed health care to an insurance company. The HMO believes that certain types of doctors are more cost-effective than others. One theory is that primary specialty is an important factor in measuring the cost-effectiveness of physicians. To investigate this, the HMO obtained independent random samples of 26 HMO physicians from each of four primary specialties-- General Practice (GP) , Internal Medicine (IM) , Pediatrics (PED) , and Family Physician (FP) -- and recorded the total per-member, per-month charges for each. Identify the treatments for this group.

A) the four specialty groups-GP, IM, PED, and FP
B) the total per-member, per-month charges
C) the 104 physicians
D) the HMO