Frasi di Ronald Fisher

Sir Ronald Aylmer Fisher è stato uno statistico, matematico e biologo britannico, viene considerato colui che ha fatto della statistica una scienza moderna, in quanto ha fondato i concetti di riferimento della statistica matematica moderna.



Wikipedia  

✵ 17. Febbraio 1890 – 29. Luglio 1962
Ronald Fisher photo
Ronald Fisher: 31   frasi 0   Mi piace

Ronald Fisher frasi celebri

“[Ultime parole famose] La teoria che il cancro al polmone è causato dal fumo verrà alla fine considerata un grandissimo, catastrofico errore.”

Origine: Da Smoking: the cancer controversy. Some attempts to assess the evidence http://www.york.ac.uk/depts/maths/histstat/smoking.htm; citato in William T. Whitby, Fumare vi fa bene, p. 6.

“La maggior parte delle grandi mutazioni è deleteria; le piccole mutazioni sono molto più frequenti e hanno maggiori probabilità di essere utili.”

Origine: Citato in AA.VV., Il libro dell'ecologia, traduzione di Roberto Sorgo, Gribaudo, 2019, p. 30. ISBN 9788858024362

Ronald Fisher: Frasi in inglese

“[…] the uncontrolled causes which may influence the result are always strictly innumerable.”

Ronald Fisher libro The Design of Experiments

The Design of Experiments (section II.9, eighth edition, 1971, Hafner Publishing Company, New York) as quoted by George Casella in Statistical Design (p. 18, 2008, Springer).
Since 1960s

“The analysis of variance is not a mathematical theorem, but rather a convenient method of arranging the arithmetic.”

Discussion to ‘Statistics in agricultural research’ by J.Wishart, Journal of the Royal Statistical Society, Supplement, 1, 26-61, 1934.
1930s

“In organisms of all kinds the young are launched upon their careers endowed with a certain amount of biological capital derived from their parents. This varies enormously in amount in different species, but, in all, there has been, before the offspring is able to lead an independent existence, a certain expenditure of nutriment in addition, almost universally, to some expenditure of time or activity, which the parents are induced by their instincts to make for the advantage of their young. Let us consider the reproductive value of these offspring at the moment when this parental expenditure on their behalf has just ceased. If we consider the aggregate of an entire generation of such offspring it is clear that the total reproductive value of the males in this group is exactly equal to the total value of all the females, because each sex must supply half the ancestry of all future generations of the species. From this it follows that the sex ratio will so adjust itself, under the influence of Natural Selection, that the total parental expenditure incurred in respect of children of each sex, shall be equal; for if this were not so and the total expenditure incurred in producing males, for instance, were less than the total expenditure incurred in producing females, then since the total reproductive value of the males is equal to that of the females, it would follow that those parents, the innate tendencies of which caused them to produce males in excess, would, for the same expenditure, produce a greater amount of reproductive value; and in consequence would be the progenitors of a larger fraction of future generations than would parents having a congenital bias towards the production of females. Selection would thus raise the sex-ratio until the expenditure upon males became equal to that upon females.”

Ronald Fisher libro The Genetical Theory of Natural Selection

On natural selection acting on sex ratio: Fisher's principle, Ch. 6, p. 141.
The Genetical Theory of Natural Selection (1930)

“We may consequently state the fundamental theorem of Natural Selection in the form : The rate of increase in fitness of any organism at any time is equal to its genetic variance in fitness at that time.”

Ronald Fisher libro The Genetical Theory of Natural Selection

Defining the fundamental theorem of natural selection, Ch. 2, p. 35.
The Genetical Theory of Natural Selection (1930)

“After all, it is a common weakness of young authors to put too much into their papers.”

Contributions to Mathematical Statistics, New York: Wiley, 1950, p. 10.308a.
1950s

“To consult the statistician after an experiment is finished is often merely to ask him to conduct a post mortem examination. He can perhaps say what the experiment died of.”

"Presidential Address to the First Indian Statistical Congress" https://www.gwern.net/docs/statistics/decision/1938-fisher.pdf, 1938. Sankhya 4, 14-17.
1930s

“Fairly large print is a real antidote to stiff reading.”

31 May 1929, in a letter to K.Sisam, Oxford University Press. Printed in Natural Selection, Heredity, and Eugenics, p. 20, ed. J.H.Bennett, Oxford: Clarendon Press, 1983.
1910s–1920s

“Natural selection is a mechanism for generating an exceedingly high degree of improbability.”

Reported by J. S. Huxley in Evolution in Action, London: Chatto and Windus, 1953.
1950s

“However, perhaps the main point is that you are under no obligation to analyse variance into its parts if it does not come apart easily, and its unwillingness to do so naturally indicates that one’s line of approach is not very fruitful.”

25 February 1933, in a letter to L. Hogben. Printed in Natural Selection, Heredity, and Eugenics, J.H.Bennett, Oxford: Clarendon Press, 1983, p. 218.
1930s

“Faith Is Not Credulity.”

Subtitle to Science and Christianity, Friend 113, 995–996, 1955.
in full: ‘Christian children should … be taught that faith does not mean credulity; but is a quality, very like courage, which makes one hold fast to that which is good, … .
1950s

“No efforts of mine could avail to make the book easy reading.”

Ronald Fisher libro The Genetical Theory of Natural Selection

Preface, p. x.
The Genetical Theory of Natural Selection (1930)

“Natural Selection is not evolution.”

Ronald Fisher libro The Genetical Theory of Natural Selection

Preface, opening sentence, p. vii.
The Genetical Theory of Natural Selection (1930)

Autori simili

Paul Dirac photo
Paul Dirac 3
fisico e matematico britannico
Richard Dawkins photo
Richard Dawkins 61
etologo, biologo e divulgatore scientifico britannico
Stephen Hawking photo
Stephen Hawking 38
matematico, fisico e cosmologo britannico
Bertrand Russell photo
Bertrand Russell 176
filosofo, logico e matematico gallese
John Nash photo
John Nash 8
matematico ed economista statunitense
Niels Bohr photo
Niels Bohr 8
fisico e matematico danese
Louis-Victor Pierre Raymond de Broglie photo
Louis-Victor Pierre Raymond de Broglie 8
matematico e fisico francese
Archibald Joseph Cronin photo
Archibald Joseph Cronin 33
scrittore britannico
Daphne du Maurier photo
Daphne du Maurier 4
scrittrice britannica
Peter Ustinov photo
Peter Ustinov 19
attore britannico