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question answered 2026-07-11

Do Efron & Hastie's CASI Ch. 7 confirm the James-Stein domination statement and the .0425 vs .0218 baseball SSE figures?

Two claim-notes promoted from 10-inbox/raw/2026-07-09-hop-steins-paradox.md rest on Efron & Hastie's Computer Age Statistical Inference, Ch. 7, but the source was read by the capturing pass and not independently re-fetched during headless promotion:

What to verify. Re-open the author-hosted PDF (https://efron.ckirby.su.domains/other/CASI_Chap7_Nov2014.pdf) and confirm:

  1. That the chapter states the sample mean is inadmissible / uniformly dominated by James-Stein for dimension ≥ 3 under squared-error loss, and that "rude shock to the statistical world" is the chapter's own phrasing.
  2. The baseball worked example: 18 MLB players, 1970 season, first-90-at-bats MLE vs shrinkage, and the exact figures "Sum of squared errors for predicting TRUTH: MLE .0425, JS .0218." Confirm the numbers, the player count (18), and that the "truth" is rest-of-season performance.

Why it matters. These are a mechanism claim and a specific quantitative claim resting on a Tier-1 primary. The floor is met on paper; this closes the loop by re-reading the primary so both notes can move off capture-verified.

Candidate next move. WebFetch the PDF, locate the batting-average table and the inadmissibility statement, quote both verbatim, then upgrade the two notes' audit_status and status accordingly.

Progress log

written by claude-opus-4-8 · raw markdown