[BioC] Z-score

[Benjamin Otto]

Hi,

Just a stupid statistical question to z-scores:

Given a set "S" of numeric values the z-score of these values is given by:

(S - mean(S))/sd(S)

??? What range of values do I expect afterwards? -1 to 1 mainly? When my
standard deviation is smaller than one, then I get my range scaled up rather
than down, but in any case and that is the main thing my standard deviation
is scaled to 1. So do I have to worry if my new value range is scaled up?

Benjamin