This is further to my post on calculator statistics.

If the calculator also stores the six values , and , then it can calculate the linear regression to a parabola.

Mathematics — Algorithms — Version Control

This is further to my post on calculator statistics.

If the calculator also stores the six values , and , then it can calculate the linear regression to a parabola.

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

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: , , [meaning , not ], , and .