mse-cross-term-vanishes-independence-zero-mean

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

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

In the MSE bias-variance derivation, the cross-term between (f - f̂) and ε vanishes because noise ε is independent of inputs and has zero mean — both assumptions are required.