Definition Joint probability
In the context of statistics, joint probability is the liklihood of two events happening at the same time.
As an example, imagine having a standard 52-card deck of playing cards. The probability of picking a black card is 26/52 = 50% because half the deck consists of red cards (hearts and diamonds) and the other half consists of black cards (clubs and spades). The probability of picking an ace is 4/52 = 7.7% since there are four aces in the deck. The joint probability of picking a black ace is 2/52 = 3.8%, since only two cards (the ace of spades and the ace of clubs) fulfill these two requirements.
Please note that the definitions in our statistics encyclopedia are simplified explanations of terms. Our goal is to make the definitions accessible for a broad audience; thus it is possible that some definitions do not adhere entirely to scientific standards.
- Joint probability