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September 10, 2026
Engineering / Upstream report
A nonzero Studentized-range tail disappears in SciPy
An exact special-case reference shows SciPy returning zero for a probability near 0.00000002, with no warning in the recorded runs.
Additional reproducer reported — upstream confirmation pending
September 10, 2026
Engineering / Upstream report
Exact rescaling can reverse SciPy’s Welch ANOVA decision
At an extreme input scale, SciPy’s Welch ANOVA changes a p-value from 0.02650 to 0.05611, crossing the 5% threshold without losing input information.
NumPy float64 repair PR #26209 open; current head is mergeable with 56 / 56 checks passing; issue #26146 open; not merged or released
September 10, 2026
Engineering / Upstream report
Renaming treatment groups changes agricolae’s REGW result
With observations and group membership unchanged, renaming groups changes a p-value from 0.0363 to 0.0791 and reverses a 5% decision.
Reported by email — upstream confirmation pending
September 9, 2026
News / Public consultation
nomue Protocol opens Release 3 public discussion for independent groups and multiple comparisons
Researchers and developers can comment on how a multi-group analysis should declare its design, comparisons, results, and error-control claims.
Public discussion open — supplied-source proposal; method adoption and numerical support remain pending
September 9, 2026
Engineering / Technical method
What power-of-two scaling can and cannot repair
Exact references show when rescaling recovers a factorial F calculation, and when lost inputs or rounding residuals require a different numerical decision.
Reviewed and steward-accepted bounded research; no additional product support
September 9, 2026
Engineering / Technical method
What “approximate” means for Games–Howell comparisons
Original-paper checks separate the construction of unequal-variance comparisons from simulation evidence and a guaranteed bound on false positives.
Reviewed and steward-accepted bounded research; no additional product support
September 9, 2026
Engineering / Technical method
Comparing with a control and comparing with the best answer different questions
Source review separates fixed-control tests, step-up and step-down calibration, and intervals that compare each treatment with the best of the others.
Reviewed and steward-accepted bounded research; no additional product support
September 9, 2026
Engineering / Technical method
What must stay fixed in a multiple-testing graph
Closed testing and graphical procedures make error control inspectable, but order, weights, stopping rules, and zero-level behavior still need precise definitions.
Reviewed and steward-accepted bounded research; no additional product support
September 9, 2026
News / Public consultation
nomue Protocol opens Release 4 public discussion for two-factor experiments
Researchers and developers can comment on a proposal connecting assumptions, results, and verification evidence for balanced two-factor experiments.
Public discussion open — reviewed unissued candidate; separate D01/D07 amendment window; no Protocol support
September 9, 2026
News / Product
nomue launches limited Release 1 for agent-callable Welch verification
nomue now gives approved recipients a way to call bounded Welch statistical verification from compatible AI agents and HTTP clients.
Limited Release 1 — approved recipients only; no public registration