bmizerany/perks — pull request #11 by u-c-l (2014-06-13 11:08:36+00:00)
Title: Fix error calculation for tests.

Change sample generation to rand.NormFloat64 to expose previous problem.

(The current way of error calculation doesn't really work when sample values are close to zero. In my understanding, ε is meant to be the error of the quantile rank, not of the resulting value.)