[Python-ideas] Proposal: add a calculator statistics module

Steven D'Aprano writes:

I propose adding a basic calculator statistics module to the standard library, similar to the sorts of functions you would get on a scientific calculator:

mean (average) variance (population and sample) standard deviation (population and sample) correlation coefficient

+1 for these.

and similar.

I'm not sure about that. I immediately thought "how about bivariate linear regression?", but that's actually misleading in many cases. Doing anything more general is beyond the scope of "like a typical scientific/statistical hand calculator". On the other hand, well-commented code showing how to do the bivariate case would help people to implement more general cases. Ditto for other common tasks like chi-square tests.