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Poisson's approximation to the binomial

I'm assuming that Poisson came up with his approximation to the binomial to ease the burden of computing the binomial coefficients for large n. I'm also assuming that as a student of Laplace, who ...
TonyK's user avatar
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Why some calculations noted as "sym^2" and "sym", while others noted as "symA" and "symB", where "symB" is the square root of "symA"?

Today I learnt that the standard deviation is calculated as square root of the mean of the squares of the deviations from the arithmetic mean of the distribution. The mean of the squares of the ...
Arunabh Bhattacharya's user avatar
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Did Egon Pearson have a PhD?

Did the statistician Egon Pearson have a PhD? If not, to what extent did he write a dissertation?
user551504's user avatar