A Doctor Prescribes a New Drug for a Sick Patient

Multiple Choice

A doctor prescribes a new drug for a sick patient. The patient gets well. Should the doctor believe that the drug made the patient well?

A) Yes. This is a single-factor experiment.
B) No. This represents a single-factor experiment
C) No. There are too many threats to reliability to draw that conclusion
D) No. There are too many threats to validity to draw that conclusion