TEN-POINT SELF-REVIEW — no accreditation or automatic grading
Each area: 0 missing/incorrect, 1 partly usable, 2 reproducible and clear.
1. Source/quality: exact scope, keys, documented blanks, provenance and readiness.
2. Summaries: correct elapsed units, counts, mean/median and inclusive thresholds.
3. Visuals: appropriate chart, honest axes/bins, count reconciliation and text fallback.
4. Groups: correct denominator weights, observed versus standardized rates, missingness coverage.
5. Interpretation: traceable evidence, no unsupported causality, specific next evidence.
Suggested target >=8/10 with no zero in summaries or interpretation; revise any unsupported causal claim. Learning acceptance is not business rollout approval.
Extension: equal email/chat weights; explain why 75% is not the observed cohort rate and is not a causal effect.