Re: [boost] [Random] - statistics_test for boost::uuids::detail::seed_rng

Subject: Re: [boost] [Random] - statistics_test for boost::uuids::detail::seed_rng
From: Steven Watanabe (watanabesj_at_[hidden])
Date: 2011-03-13 14:40:56

AMDG

On 03/13/2011 11:25 AM, Andy Tompkins wrote:
> I'm trying to determine how well the boost::uuids::detail::seed_rng
> generates random numbers.
>
> I changed (just on my machine) the statistics_test of the random library
> so that it will also test seed_rng.  Sadly I don't really know how to
> interpret the results that follow.  I included the mt19937 results as
> well.  I assume the results are good.  Would someone confirm that and
> maybe tell me how good/bad they are?

I think the * indicates a potential issue.
Other than that, it's been a while since I
looked at the code, so I don't remember
what the output means off the top of my head.

> D:\Code\boost-trunk\libs\random\test>statistic_tests.exe
> Confidence level: 0.99; 1-alpha = 0.01; chi_square(19, 36.1909) = 0.99
> Running tests on seed_rng
> KS: 15.92 16.4
> equidistribution: 19.28 15.84  2D: 27.12 17.6
> runs: up: 18 33.04   down: 22.96 11.12 gaps: 23.6 15.68
> poker: 15.6 24.32
> coupon collector: 17.2 11.76
> permutation: 27.92 21.12
> maximum-of-t: 24.4 8.48
> birthday spacing: 16.4 20.5333
>
> Running tests on mt19937
> KS: 21.36 19.2
> equidistribution: 22.16 20.88  2D: 29.2 18
> runs: up: 16.72 19.04   down: 21.68 37.6* [0.00666986] gaps: 12.72 19.2
> poker: 18.48 14.8
> coupon collector: 18 11.76
> permutation: 17.04 22.8
> maximum-of-t: 14.96 22.08
> birthday spacing: 19.6 10.6667

In Christ,
Steven Watanabe