real_or_sampling

io.github.beepboop2025/noisefloor · Verify this server

Review whether the latest numeric metric departure persists after accounting for its historical linear association with measurement sample size. Use when both a dashboard metric and its coverage denominator are available; choose did_it_change when no denominator is known. Requires at least ten aligned pairs; shorter valid arrays return NOT_ENOUGH_HISTORY. The latest pair is excluded from the historical fit. Returns verdict, assessment, reading and, when estimable, metric_delta in input units, standardized departures, sample_size_change_pct as a percent of the historical median, fit and departure_after_conditioning. Prefer assessment/validity over legacy REAL or SAMPLING_ARTIFACT labels: linear association neither proves a sampling cause nor excludes confounding. Constant or weakly related histories can return UNCLEAR and null standardized values. Unequal array lengths or nonpositive sample sizes return a tool error.