YOUR 160–220 WORD EVIDENCE NOTE
1. Scope/provenance, creation cohorts and cutoff:
2. Main observation with fractions, correct units and change label:
3. Segment/mix context and guardrail:
4. Missingness/alternative explanations and specific unsupported claims:
5. Proposed next evidence and decision review (no invented approval):
Attachments: source profile, derived durations, common-bin chart/table, weighted group comparison, explanation ledger.
Independent extension: use equal channel weights in both cohorts; distinguish from observed rates and causal counterfactuals.