SELF-REVIEW; no instructor grade, certification or employment guarantee.
[ ] Metric unit, population, duplicate policy and window written before analysis.
[ ]45 raw events reconcile to41; internal/missing/conflicting records explained.
[ ] Funnel12,8,5; overall and conditional denominators distinguished.
[ ] Cohort membership fixed and same product ages compared.
[ ] Exact day 7 versus day 8/rolling returns distinguished.
[ ] Immature cohort N/A; pooled mature3/8, never3/12.
[ ] One assignment/outcome per user,ITT and missing observation rule retained.
[ ]+8 percentage points versus+40%relative, interval and approximate sample plan explained.
[ ] SRM is diagnostic, not proof; sparse guardrail and peeking/multiplicity limits stated.
[ ] Memo distinguishes fictional/descriptive/causal claims and identifies own contribution.
[ ] Original controls retained; own changed scenario independently tested and documented.
