On Thu, Jul 9, 2009 at 8:48 PM, John Williams <jwilliams4...@gmail.com>wrote:
> On Thu, Jul 9, 2009 at 9:11 PM, Doug Pensinger<brig...@zo.com> wrote: > > > I'd estimate the efficiency of my gmail filter is 99% or better. > > That is a particularly uninformative statistic. > > Much more interesting would be two figures: probability of false > positives ( number of real marked as spam / number of real), and > probability of false negatives (number spam passed as real / number of > spam). > For a one week period 0/150, 1/150, approximately. I may have had one or two false positives this year. Doug
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