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Calibration matches record counts rather than population margins · case 03

Calibration matches record counts rather than population margins.

Member previewVariant 3 · 3 implementations · 6 checks per implementation

Case contract

Rows are (cell,positive base weight); margins give positive population totals for exactly the represented cells. Return weights in input order rounded to eight decimals; empty inputs return empty list.

Why this case matters

A deterministic survey-design model isolates this sampling contract before it is embedded in a larger estimation pipeline.

One recorded failure

Sample boundary fixture

This sample comes from the broken implementation of a controlled reproducer.

Boundary fixture	Actual	Expected	Outcome
unequal base weights	`[12.0, 12.0]`	`[6, 18]`	Failed

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