Your question is Choosing a Significance Test. 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).
You observe a metric change after comparing two versions of a digital experience, and you need to decide whether the difference is likely real or just noise. You are asked to explain how you would choose the right statistical test.
What statistical test would you use to determine whether an observed change is significant?