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Old 06-17-2012, 05:33 PM   #4
Bionic Poster
Join Date: Oct 2005
Posts: 34,448

Probability is always used for the future. In the present, it is only relative frequency.

If you want to revise the probabilities based on new data, then you need to apply Bayes theorem and posteriori and a priori probabilities. That is how signal estimation is done in presence of noise as more and more samples arrive.
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