A hypothesis is a testable cause-and-effect proposition linking an intervention or decision to a primary outcome. It gives an experiment a focused question: what change should affect what result? section 1.3.4
Use a hypothesis to structure an A/B test:
- State the proposed relationship between treatment and outcome. section 1.3.4
- Design the experiment, accounting for context-specific rules and ethical concerns. section 1.3.4
- Execute the experiment carefully, especially the randomization process, then compare group responses. section 1.3.4
Testing a new treatment
A starting hypothesis may claim that a new disease treatment works just as well as the old one. If the new treatment is superior, experimental evidence should refute that claim. Patient outcomes such as 80% improving with the new treatment versus 70% with the old treatment provide the observed comparison. section 1.3.4








