# kindageeky

## Factoring a marginal probability from a conditional probability distribution

In studying probabilistic graphical models, had the “fun” of hand factoring changes to the probability distributions in a bayesian network.  Some good tips here, here, and here if you need to do something like…

Determine $P(accident | trafficjam)$ given a CPD on $P(trafficjam | accident, president traveling)$

Also very useful is Daphne Koller’s book, Chapters 2 & 3.