private float CalcStdMax(List <int> distances)
{
var newDists = CreateBiasedDistances(distances);
double avg = MathHelperModule.CalcAvg(newDists);
double diffs = 0;
newDists.ForEach(i => diffs += Math.Pow((i - avg), 2));
double div = diffs / avg;
float res = (float)Math.Sqrt(div);
return(res);
}