Depending on the state, hospice provides doctor services, nursing care, medical equipment, medical supplies, prescriptions, home health aids, spiritual services, on-call care, etc.
By he NIH trying a new drug to help reduce pain associated with sickle-cell anemia, it's an example of an "experiment".
An experiment involves a hypothesis (an educated guess as to what's going to happen) and trying out the hypothesis and finding the solution.
