Welcome to your interview.
The question is on your right: Sample Size for Statistical Significance. Take a moment with it first.
Talk your thinking through with me if you like - when you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes). Discussion and graded submissions share your five interviewer interactions, so spend them well.
A merchant partner wants to run a joint marketing campaign with limited budget at Affirm. How do you determine the minimum viable audience size required to achieve statistical significance in our performance tracking?