math/hs-statistics: import hs-statistics-0.16.2.1

This library provides a number of common functions and types useful in
statistics. We focus on high performance, numerical robustness, and use of
good algorithms. Where possible, we provide references to the statistical
literature.

The library's facilities can be divided into four broad categories:

* Working with widely used discrete and continuous probability
  distributions. (There are dozens of exotic distributions in use; we focus
  on the most common.)

* Computing with sample data: quantile estimation, kernel density
  estimation, histograms, bootstrap methods, significance testing, and
  regression and autocorrelation analysis.

* Random variate generation under several different distributions.

* Common statistical tests for significant differences between samples.

(pho)