qualGaussDev: Compute probability of Gaussian (mu=m, sd=s) at a position 0, with reference
to the max obtainable probability of that Gaussian at its center.
Description
Measure for centeredness around 0.
Highest score is 1, worst score is 0.
Usage
qualGaussDev(mu, sd)
Value
quality, ranging from 0 (bad agreement) to 1 (perfect, i.e. centered at 0)