© 2000 Todd Neller.  A.I.M.A. text figures © 1995 Prentice Hall.  Used by permission.
Joint Probability Example
•What's the probability of having a cavity given the evidence of a toothache?
•Like a lookup table for probabilities: can easily have too many entries for practical entry Þ motivation for conditional probabilities
0.89
0.01
ØCavity
0.06
0.04
Cavity
ØToothache
Toothache