Question 638: A Total Statistic Partitions the Complete Sample Carrier into Fibers

Original question and givens

Use complete theta labels=[a12, b12], samples=[120, 121, 122, 123], aligned exact probability rows=[[[2, 5], [1, 10], [2, 5], [1, 10]], [[1, 10], [2, 5], [1, 10], [2, 5]]] and total statistic=[0, 1, 0, 1]. Each theta law is normalized. Fibers partition the full sample carrier, retaining zero-mass cells. Give (samples, aligned_statistic, fibers, partition, certificate).

• G001 — Use complete theta labels=[a12, b12], samples=[120, 121, 122, 123], aligned exact probability rows=[[[2, 5], [1, 10], [2, 5], [1, 10]], [[1, 10], [2, 5], [1, 10], [2, 5]]] and total statistic=[0, 1, 0, 1]. Each theta law is normalized. Fibers partition the full sample carrier, retaining zero-mass cells. Give (samples, aligned_statistic, fibers, partition, certificate).

Definition and scope

The statistic is total on the sample carrier; the fibers by value are disjoint and cover every sample.

• mko-finite-sufficient-statistic

Step-by-step derivation

Θ=[a12, b12]; Ω=[120, 121, 122, 123]

[[2/5, 1/10, 2/5, 1/10], [1/10, 2/5, 1/10, 2/5]]

P_a12(Ω) := sum(2/5, 1/10, 2/5, 1/10)

P_a12(Ω) = 1

P_b12(Ω) := sum(1/10, 2/5, 1/10, 2/5)

P_b12(Ω) = 1

sample=120

T(120)=0

sample=121

T(121)=1

sample=122

T(122)=0

sample=123

T(123)=1

[(120, 0), (121, 1), (122, 0), (123, 1)]

fibers=[[0, [120, 122]], [1, [121, 123]]]

Reverse checks

• S008 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.
• S007 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.
• S006 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.
• S005 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.
• S004 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.
• S003 · premise_and_result_audit — Recompute P_b12(Ω) with exact rational arithmetic, not rounded decimals.
• S002 · premise_and_result_audit — Recompute P_a12(Ω) with exact rational arithmetic, not rounded decimals.
• S001 · premise_and_result_audit — Retain every parameter and sample label; distinguish null, empty tables, zero distributions and tied optima.

Result

([120, 121, 122, 123], [0, 1, 0, 1], [[0, [120, 122]], [1, [121, 123]]], Yes, total_statistic_fibers_partition_sample_space)

The full substitutions and premise audits recover the original answer, retaining its field order and verdict meanings.

This question review and source binding

Review date: 2026-10-26

Original questions, answers, step expressions, numeric ASTs and historical records are retained. Source candidate labels remain historical and are not overwritten as formal proof.