Your question is Correcting a Simple Analytical Mistake. 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).
Tell me about a time you made a simple quantitative mistake in your analysis or communication, caught it late, and had to recover quickly. How did you handle it, how did you communicate it, and what changed in your process afterward?