History of the Normal Distribution - University of Utah
History of the Normal
Distribution
Jenny Kenkel
History of the Normal Distribution
Jenny Kenkel November 8th, 2016
Probabiltiy Distributions
History of the Normal
Distribution
Jenny Kenkel
A probability distribution is a function f (x) so that
b
P(a < X < b) = f (x)dx
a
The Normal Distribution
History of the Normal
Distribution
Jenny Kenkel
The normal distribution is a family of distributions, given by
1 f (x) =
e-
(x -?)2 22
22
The Standard Normal has ? = 0 and = 1, i.e.
1 x2 f (x) = e 2
2
Changing ? changes the location of the curve, and changing changes the spread of the curve
Arbuthnot: "An argument for Divine Providence, taken from the constant Regularity observ'd in the Births of both Sexes"
History of the Normal
Distribution
Jenny Kenkel
Argued the probability
that more males than
females were born every
year from 1629 to 1710,
82 years, was
1 82 2
Arbuthnot: "An argument for Divine Providence, taken from the constant Regularity observ'd in the Births of both Sexes"
History of the Normal
Distribution
Jenny Kenkel
Argued the probability
that more males than
females were born every
year from 1629 to 1710,
82 years, was
1 82 2
But the fact that not
many more males than
females were born every
year was proof polygamy is
contrary to the laws of
nature
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