Question: "How likely is person X to buy the newest BMW M5?" By creating a classification tree (a decision tree), the data can be mined to determine the likelihood of this person to buy a new M5. Possible nodes on the tree would be age, income level, current number of cars, mariatl status, kids, homeowner, or renter. The attributes of this person can be used against the decision tree to determine the likelihood of him purchasing the M5.