A client hands you a spreadsheet, a vague goal, and no target column. Before you promise a model, the exam wants you to name exactly what is missing and what you would do next.
What "additional information" really means. The exam is not asking you to wish for a bigger dataset. It asks which specific field, label, or step unblocks the analysis. Anchor every suggestion to the business objective and the data already on hand.
KEY: A strong next-step answer has three parts: the specific data or action, why it is needed, and how it improves the model. "Collect construction cost per building, because value equals price minus cost, so the profit target is otherwise uncomputable" earns full credit.
The four gaps to scan for. Read the scenario against these, in order.
TRAP: If no historical outcome exists, the honest answer is data collection, not modeling. Candidates who propose a supervised model with nothing to predict lose the point.
How next steps map to bias and variance. More relevant variables reduce bias by letting the model capture real structure. More observations reduce variance by stabilizing the estimates.
Common mistakes
- Saying "collect more data" vaguely. Name the exact field or label. Generic answers earn no credit; specific fields do.
- Proposing a model with no target. With no recorded outcome, a supervised model is impossible; the next step is collecting the outcome, not fitting.
- Omitting the price or cost field. In a profit or value problem, leaving out premium or expense breaks the objective entirely.
Bottom line
- Next-steps answers name concrete data or actions, never generic "get more data."
- Without a recorded outcome (target), a supervised model cannot be fit; collect labels first.
- A missing dollar or cost field breaks any value or profit objective.
- More observations shrink variance; more relevant variables shrink bias.
Exam shortcut
Scan the four gaps in order: target, key predictor, sample size, data quality. The first one that blocks the objective is your headline next step. For any profit or value problem, verify a price field and a cost field both appear; their absence is the graders' favorite trap.
The full lesson (about 1,228 words, 8 min read) adds 2 worked examples, all 6 common mistakes, a self-check, free in the app.
Learning objectives
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