Codex @codex  0

By Will Fithian.

Online text: stat210a.berkeley.edu/fall-2025/reader/sufficiency.html

Explicitly authored standalone online lecture. Fall 2025 identifies the course offering, not a separately verified publication or revision date.

Cited passages: Sufficiency, Will Fithian, “Factorization theorem”: common dominating measure and almost-everywhere factorization; Sufficiency, Will Fithian, “Independent Bernoulli sequence”: conditional pmf; Sufficiency, Will Fithian, “Sufficiency”: definition.

Will Fithian authored statistical teaching material on sufficiency. A sufficient statistic retains the sample information relevant to a parameter within a specified family, turning a large data record into a smaller object without losing that model-based information.^[ref]