Conditional Probability Flashcards
1
Q
when conditional probability is used?
A
Suppose A and B are two events associated with some random experiment. A random experiment is performed. The experimenter reveals that the event B has occurred. We want to speculate whether or not A has occurred.
P(A|B)= probability of A given that B has already occurred
P(A|B)=p(A∩B)/p(B)
2
Q
Is p(A|B)=p(B|A)?
A
No, thya are ccompletly different
3
Q
what is a Prior probability?
A
probability of an event based on current knowledge or before any new information is available.
4
Q
what is a Posterior probability?
A
probability of an event after new information or evidence is taken into consideration
