Re: gaussian distribution pgbench

Hello Gavin,

>>  decile percents: 69.9% 21.0% 6.3% 1.9% 0.6% 0.2% 0.1% 0.0% 0.0% 0.0%
>>  probability of fist/last percent of the range: 11.3% 0.0%

> I would suggest that probabilities should NEVER be expressed in percentages! 
> As a percentage probability looks weird, and is never used for serious 
> statistical work - in my experience at least.
>
> I think probabilities should be expressed in the range 0 ... 1 - i.e. 0.35 
> rather than 35%.

I could agree about the mathematics, but ISTM that "11.5%" is more 
readable and intuitive than "0.115".

I could change "probability" and replace it with "frequency" or maybe 
"occurence", what would you think about that?

-- 
Fabien.