Re: background subtraction

N.J.Goulding (N.J.Goulding@qmw.ac.uk)
Wed, 8 Nov 1995 14:43:15 +0000 (GMT)

Dear Alice,

I think it is unnecessary to do any math on what is after all
an arbitary cut-off of positivity.

Surely it is satisfactory to quote the % positivity of your test population
together with your arbitary cut-off of positivity and leave it at that.
(ie you DEFINE your negative population as having 5% or 3% positivity)


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