第 20784 題：Chebyshev不等式

原題與已知條件

完整有限law、finite mean與variance及positive epsilon。操作=cheb-tail-probability；資料={"masses":[[1,14],[2,14],[11,14]],"values":[0,9,12],"epsilon":[3,1]}。請依 exact_ordered_tuple_declared_by_interface 欄序回答。

• G001 — 完整有限law、finite mean與variance及positive epsilon。操作=cheb-tail-probability；資料={"masses":[[1,14],[2,14],[11,14]],"values":[0,9,12],"epsilon":[3,1]}。請依 exact_ordered_tuple_declared_by_interface 欄序回答。

定義與適用範圍

沿用原題明示的論域、假設與來源 MKO 定義。本題已完成第二對話數理與中英語義覆核，並由原始參數逐題獨立重算模型、答案與每個算術步驟；原題仍為 candidate。

• mko-chebyshev-inequality

逐步推導

source operation=cheb-tail-probability;original snapshot and mathematics retained

explicit ordered source output fields=[mean, epsilon, tail_probability, certificate]

Chebyshev complete probability law mass := sum(1/14, 1/7, 11/14)

Chebyshev complete probability law mass = 1

Chebyshev original atom0 weighted SIGNED X := mul(1/14, 0)

Chebyshev original atom0 weighted SIGNED X = 0

Chebyshev original atom1 weighted SIGNED X := mul(1/7, 9)

Chebyshev original atom1 weighted SIGNED X = 9/7

Chebyshev original atom2 weighted SIGNED X := mul(11/14, 12)

Chebyshev original atom2 weighted SIGNED X = 66/7

Chebyshev complete SAME-law mean := sum(0, 9/7, 66/7)

Chebyshev complete SAME-law mean = 75/7

Chebyshev original atom0 X minus SAME mean := sub(0, 75/7)

Chebyshev original atom0 X minus SAME mean = -75/7

Chebyshev original atom0 centered SQUARE := mul(-75/7, -75/7)

Chebyshev original atom0 centered SQUARE = 5625/49

Chebyshev original atom0 weighted centered square := mul(1/14, 5625/49)

Chebyshev original atom0 weighted centered square = 5625/686

Chebyshev original atom1 X minus SAME mean := sub(9, 75/7)

Chebyshev original atom1 X minus SAME mean = -12/7

Chebyshev original atom1 centered SQUARE := mul(-12/7, -12/7)

Chebyshev original atom1 centered SQUARE = 144/49

Chebyshev original atom1 weighted centered square := mul(1/7, 144/49)

Chebyshev original atom1 weighted centered square = 144/343

Chebyshev original atom2 X minus SAME mean := sub(12, 75/7)

Chebyshev original atom2 X minus SAME mean = 9/7

Chebyshev original atom2 centered SQUARE := mul(9/7, 9/7)

Chebyshev original atom2 centered SQUARE = 81/49

Chebyshev original atom2 weighted centered square := mul(11/14, 81/49)

Chebyshev original atom2 weighted centered square = 891/686

Chebyshev full variance E centered square := sum(5625/686, 144/343, 891/686)

Chebyshev full variance E centered square = 486/49

ORIGINAL complete normalized masses=[1/14, 1/7, 11/14];ALL aligned SIGNED values X=[0, 9, 12];SAME-law mean=75/7;all deviations=[-75/7, -12/7, 9/7]

ALL nonnegative squared deviations Y=[5625/49, 144/49, 81/49];variance=E[Y]=486/49;finite moments;variance0 iff X=mean on EVERY POSITIVE-mass atom,not necessarily null atoms

Chebyshev original atom0 absolute-event probability mass := mul(1/14, 1)

Chebyshev original atom0 absolute-event probability mass = 1/14

ORIGINAL atom=0;SIGNED centered deviation=-75/7;absolute deviation=75/7;positive epsilon=3

event abs(deviation)>=epsilon=是;EQUALITY INCLUDED;probability contribution=1/14

Chebyshev original atom1 absolute-event probability mass := mul(1/7, 0)

Chebyshev original atom1 absolute-event probability mass = 0

ORIGINAL atom=1;SIGNED centered deviation=-12/7;absolute deviation=12/7;positive epsilon=3

event abs(deviation)>=epsilon=否;EQUALITY INCLUDED;probability contribution=0

Chebyshev original atom2 absolute-event probability mass := mul(11/14, 0)

Chebyshev original atom2 absolute-event probability mass = 0

ORIGINAL atom=2;SIGNED centered deviation=9/7;absolute deviation=9/7;positive epsilon=3

event abs(deviation)>=epsilon=否;EQUALITY INCLUDED;probability contribution=0

Chebyshev COMPLETE absolute-deviation tail probability := sum(1/14, 0, 0)

Chebyshev COMPLETE absolute-deviation tail probability = 1/14

逐步反向核對

• S024 · premise_and_result_audit — 以精確有理數重算 Chebyshev COMPLETE absolute-deviation tail probability，不以小數近似替代。
• S023 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S022 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom2 absolute-event probability mass，不以小數近似替代。
• S021 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S020 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom1 absolute-event probability mass，不以小數近似替代。
• S019 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S018 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom0 absolute-event probability mass，不以小數近似替代。
• S017 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。
• S016 · premise_and_result_audit — 以精確有理數重算 Chebyshev full variance E centered square，不以小數近似替代。
• S015 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom2 weighted centered square，不以小數近似替代。
• S014 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom2 centered SQUARE，不以小數近似替代。
• S013 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom2 X minus SAME mean，不以小數近似替代。
• S012 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom1 weighted centered square，不以小數近似替代。
• S011 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom1 centered SQUARE，不以小數近似替代。
• S010 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom1 X minus SAME mean，不以小數近似替代。
• S009 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom0 weighted centered square，不以小數近似替代。
• S008 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom0 centered SQUARE，不以小數近似替代。
• S007 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom0 X minus SAME mean，不以小數近似替代。
• S006 · premise_and_result_audit — 以精確有理數重算 Chebyshev complete SAME-law mean，不以小數近似替代。
• S005 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom2 weighted SIGNED X，不以小數近似替代。
• S004 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom1 weighted SIGNED X，不以小數近似替代。
• S003 · premise_and_result_audit — 以精確有理數重算 Chebyshev original atom0 weighted SIGNED X，不以小數近似替代。
• S002 · premise_and_result_audit — 以精確有理數重算 Chebyshev complete probability law mass，不以小數近似替代。
• S001 · premise_and_result_audit — 回到原始資料與本步條件核對，不把單向推論誤稱等價。

結論

(75/7, 3, 1/14, exact_absolute_deviation_tail)

依上列完整代值及條件核對得到原題答案；原題編號、格式與狀態保持不變。

本題覆核與來源綁定

覆核日期：2026-10-26

原題、答案、步驟表達式、數值 AST 與既有歷史保持原樣；原來的候選狀態屬於來源歷史，不覆寫為形式化證明。