Archive for the ‘Mathematical Statistics’ Category

Further Calculator Statistics

Tuesday, 28 April 2009

This is further to my post on calculator statistics.

If the calculator also stores the six values \Sigma x^3, \Sigma x^4 and \Sigma x^2y, then it can calculate the linear regression to a parabola.

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Dimensional Analysis of Statistical Formulae

Monday, 20 April 2009

Dimensional analysis (also used in Physics) can be used to check statistical formulae.

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Calculator Statistics

Monday, 20 April 2009

I find it fascinating that calculators can perform some quite complex statistical analysis without storing the whole data set. Rather, they store just six values: n, \Sigma x, \Sigma x^2 [meaning \sum{(x^2)}, not (\sum{x})^2], \Sigma y, \Sigma y^2 and \Sigma xy.

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