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R. A Fisher

R. A Fisher. Keara Laessig Statistics Mod 1. 1890-1962. Childhood.

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R. A Fisher

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  1. R. A Fisher KearaLaessig Statistics Mod 1 1890-1962

  2. Childhood Fisher was born in East Finchley in London, England, to George and Katie Fisher. He had a happy childhood, with three older sisters and an older brother. His mother died when he was 14. 18 months later his father lost his business.

  3. School Years When Fisher was 16 he won a competitive math contest at Harrow School. Although Fisher was a brilliant math student he was partially blind. He was tutored in math to see and solve arithmetic equations' in his head instead of on paper.

  4. Cambridge University After attending Gonville and Caius College, Cambridge, Fisher went on to develop the Cambridge University.

  5. Contributions to Statistics Invented • maximum likelihood • analysis of variance Pioneered • the design of experiments Originated • Sufficiency • Ancillary • Fisher information

  6. Definitions • Maximum Likelihood- a method of point estimation that estimates an unobservable population with parameter(s) that maximizes the likelihood function. Examples in our book Pgs 320-321, 330, 357, 367 Taken from source 1

  7. Definitions Continued • Analysis of variance- (ANOVA) is a collection of statistical models and their associated procedures which compare means by splitting the overall observed variance into different parts. Examples in your book: Pgs 634-672 From Source 1

  8. Definitions Continued • The design of experiments- • He described how to test the hypothesis that a certain lady could distinguish by flavor alone whether the milk or the tea was first placed in the cup. While this sounds like a frivolous application, it allowed him to illustrate the most important ideas of experimental design: • Randomizations • Replication • Blocking • Orthogonality • use of factorial experiments instead of the one-factor-at-a-time method In your book: All of chapter 1

  9. Definitions Continued • Sufficiency- There is no specific definition for this term. The concept is just learned. Learn it Online at- http://en.wikipedia.org/wiki/Sufficient_statistic Or http://www.cscs.umich.edu/~crshalizi/notabene/sufficient-statistics.html

  10. Definitions Continued • Ancillary- a statistic whose probability distribution does not depend on which of the probability distributions among those being considered is the distribution of the statistical population from which the data were taken. • Learn about it online at: http://en.wikipedia.org/wiki/Ancillary_statistic Or http://www.ds.unifi.it/VL/VL_EN/point/point6.html From source 1

  11. Definitions Continued • Fisher information- the variance of the score. Examples in book: (Fishers Exact Test) Pg 614-615 From source 1

  12. Recognition and other Work In 1929 Fisher was recognized by his peers and was accepted into the Royal society. In 1943 Cambridge University Fisher was offered the Balfour Chair of Genetics. In 1952 Fisher was dubbed a Knight Bachelor by Queen Elizabeth II. Aside from a statistician Fisher was also a biologist. He wrote a book on the genetic theory of the Natural selection.

  13. R. A. Fisher Summed Up • Invented and Pioneered…. • maximum likelihood • analysis of variance • the design of experiments • Sufficiency • Ancillary • Fisher information • Also made contributions in science. • Won many awards and was recognized by Queen Elizabeth II.

  14. Sourses • http://www.fact-archive.com/encyclopedia/Ronald_Fisher • http://en.wikipedia.org/wiki/Ronald_Fisher • Statistics Book

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