correction concept
| Definition | An erratum or retraction, a change to a published number or claim that the record keeps beside the original, naming what was wrong and what replaced it. The Nadeau and Bengio adjustment is a statistical correction and has its own entry. Also corrected. |
|---|---|
| Example | The uncorrected t was stored as a sigma, and the corrected table changed nine wins to three, with seventeen ties. |
| Book | Data Mining as Observation, draft 0.2, commit f3914f0; entry id correction, kind concept. |
| Status | no ledger row names this entry. Corrections: none recorded. |
| Defining equation | none |
| Assumptions and scope |
|
| Prior art | none recorded |
| Evidence | lean/DataMiningAsObservation/Seal.lean |
| Reviewed | semantic review 2026-09-06; generated 2026-09-10 from records at the commits on the provenance page. |
Equation
none
Conditions
- An erratum or retraction that the record keeps beside the original. A changed digest proves a changed file, so a correction is itself a sealed object, and the rows it corrects stay visible with the correction pointing at them.
- A correction can be the wrong shape. The uncorrected t was stored as a sigma, and the fitted correction that transferred with mean absolute error zero was the identity. The rescaling of a variance for a dependence the harness ignored is a different object, the Nadeau and Bengio correction.
Conditions are curated in entries.toml rather than read
from a record.
Ledger
none
First stated
Chapter 2 section 2.4 and chapter 8 section 8.5 of Data Mining as
Observation, with the standing corrections in
geometric-observation/claims/LEDGER.md.
Measurements
| Where the book states it | Numbers, as the book’s sources table records them | Source |
|---|---|---|
| chapter 6 section 6.4 | the uncorrected t stored as sigma, 251 and 15.84, nine wins to three, seven, eight, 3 wins 17 ties 11 losses on 31 datasets, the three-way inconsistency | constraint-gap/review/FINDINGS.md:1-35;
constraint-gap/README.md:57-76 |
Failures and corrections
none
Invariance envelope
none declared
Machine checked
lean/DataMiningAsObservation/Seal.lean,
theorems changed_of_hash_ne, hash_eq_of_eq,
exists_collision, at observation-data-mining f3914f0; what
the check covers is stated in the book’s appendix
C.
Used in
Data Mining as Observation primer S, chapters 0, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 13, 14.
Related
Nadeau and Bengio correction; ledger class; sealed; harness.
See also
Ledger rows that cite the entry’s records without naming it: NEG-9, NEG-13 → resolved.
Sources-table rows that share a record with the entry without naming it: chapter 6 section 6.4, chapter 6 section 6.5, chapter 8 section 8.5.
Status
Generated 2026-09-10 by encyclopedia/generate.py; book
at observation-data-mining f3914f0; the commit of every record is listed
in the encyclopedia’s provenance.