A new drug is found to be effective on 90% of the patients tested.
- Is the 90% effective rate best classified as a priori classical probability, empirical classical probability or subjective probability?
- If the drug is administered to 20 randomly chosen patients at a large hospital, find the probability that it is effective for:
- fewer than five of the patients
- 10 or more of the patients
- all 20 of the patients