Business Case Studies & Business Publications

A Bayesian Examines the Lady Tasting Tea...

Pfeifer, Phillip E...

Technical Note

A Bayesian Examines the Lady Tasting Tea (Abridged)

Pfeifer, Phillip E.

QA-0768 | Published June 13, 2011 | 4 pages Technical Note

Collection: Darden School of Business

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This technical note accompanies the case/class on "The Lady Tasting Tea" (LTT). It describes how a Bayesian would update his or her prior probability for the probability the LTT can correctly distinguish cups of tea based on whether the milk was added first or last. The long-form note (UVA-QA-0769) describes both a discrete model (LTT has p of 0.5 or 0.8) and a more complicated continuous model (p is beta distributed). This abridged note describes only the discrete model. The case/class itself provides a very useful analogy with which students can explore the elements of statistical inference.