Your question is Experiment Design for Hypotheses. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
How would you structure an experiment to test a specific hypothesis?
Explain how you would translate the hypothesis into measurable outcomes, select treatment and control conditions, randomize units, determine sample size, and define the statistical analysis before collecting data. Use a two-arm experiment with a continuous outcome for illustration and state any assumptions, validity checks, and decision criteria.