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Muriel Bristol

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Title: Muriel Bristol  
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Subject: Lady tasting tea, Fisher's exact test, P-value, Women scientists, 1950 deaths
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Muriel Bristol

B. Muriel Bristol-Roach (21 April 1888 - 15 March 1950), Ph.D., was a scientist working in the field of alga biology who worked at the Rothamsted Experimental Station in 1919.[1] In addition to her scientific work, she is notable for being the woman whose claim to be able to tell whether the milk or the tea was poured into a cup first prompted Ronald Fisher to devise Fisher's exact test to assess the statistical significance of such claims – see lady tasting tea. The test was actually performed, and Dr. Bristol-Roach successfully identified "more than enough ... to prove her case".[2]


  1. ^ Daniel F. Jackson, Algae, Man, and the Environment: Proceedings of an International Symposium (1969) [2]
  2. ^ "Lady Tasting Tea", from Lt. Col. Rod Sturdivant, Ph.D., U.S. Military Academy, Dept. of Mathematical Sciences
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