irreducible-error-lower-bound-on-mse

IN premise — entries/2026/06/21/wiki-BiasE28093variance_tradeoff-chunk-2.md

Created 2026-06-21T09:55:49+00:00

The irreducible error σ² is a hard lower bound on achievable MSE, independent of model choice, because all three decomposition terms are non-negative.