第 20775 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-qualification；資料={"masses":[[1,30],[2,30],[27,30]],"values":[0,25,28]}。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-qualification；資料={"masses":[[1,30],[2,30],[27,30]],"values":[0,25,28]}。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-qualification;original snapshot and mathematics retained

explicit ordered source output fields=[masses, values, mean, variance, finite_moment_certificate, certificate]

Chebyshev complete probability law mass := sum(1/30, 1/15, 9/10)

Chebyshev complete probability law mass = 1

Chebyshev original atom0 weighted SIGNED X := mul(1/30, 0)

Chebyshev original atom0 weighted SIGNED X = 0

Chebyshev original atom1 weighted SIGNED X := mul(1/15, 25)

Chebyshev original atom1 weighted SIGNED X = 5/3

Chebyshev original atom2 weighted SIGNED X := mul(9/10, 28)

Chebyshev original atom2 weighted SIGNED X = 126/5

Chebyshev complete SAME-law mean := sum(0, 5/3, 126/5)

Chebyshev complete SAME-law mean = 403/15

Chebyshev original atom0 X minus SAME mean := sub(0, 403/15)

Chebyshev original atom0 X minus SAME mean = -403/15

Chebyshev original atom0 centered SQUARE := mul(-403/15, -403/15)

Chebyshev original atom0 centered SQUARE = 162409/225

Chebyshev original atom0 weighted centered square := mul(1/30, 162409/225)

Chebyshev original atom0 weighted centered square = 162409/6750

Chebyshev original atom1 X minus SAME mean := sub(25, 403/15)

Chebyshev original atom1 X minus SAME mean = -28/15

Chebyshev original atom1 centered SQUARE := mul(-28/15, -28/15)

Chebyshev original atom1 centered SQUARE = 784/225

Chebyshev original atom1 weighted centered square := mul(1/15, 784/225)

Chebyshev original atom1 weighted centered square = 784/3375

Chebyshev original atom2 X minus SAME mean := sub(28, 403/15)

Chebyshev original atom2 X minus SAME mean = 17/15

Chebyshev original atom2 centered SQUARE := mul(17/15, 17/15)

Chebyshev original atom2 centered SQUARE = 289/225

Chebyshev original atom2 weighted centered square := mul(9/10, 289/225)

Chebyshev original atom2 weighted centered square = 289/250

Chebyshev full variance E centered square := sum(162409/6750, 784/3375, 289/250)

Chebyshev full variance E centered square = 5726/225

ORIGINAL complete normalized masses=[1/30, 1/15, 9/10];ALL aligned SIGNED values X=[0, 25, 28];SAME-law mean=403/15;all deviations=[-403/15, -28/15, 17/15]

ALL nonnegative squared deviations Y=[162409/225, 784/225, 289/225];variance=E[Y]=5726/225;finite moments;variance0 iff X=mean on EVERY POSITIVE-mass atom,not necessarily null atoms

逐步反向核對

• 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

([1/30, 1/15, 9/10], [0, 25, 28], 403/15, 5726/225, 是, finite_mean_and_variance)

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。