Your question is Statistics for Model Evaluation. 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).
Explain how you use p-values, cross-validation, and dataset preparation in an analysis or modeling project.
Describe the purpose of each technique, how you apply it in practice, and how you avoid common sources of bias or leakage. Include how your approach changes between hypothesis testing and predictive modeling.