## Data Mining Quiz 2 Flashcard

If a store has N items, the number of possible itemsets is

2

^{N}-1
An association rule is valid if it satisfies:

Both support and confidence criteria

An itemset is frequent if it satisfies the:

Support criteria

Which of the following property is used by the apriori algorithm:

Antimonotone property of support

Consider three itemsets I1={bat, ball, wicket}, I2={bat, ball}, I3={bat}. Which of the following statements are correct?

none of the statements A and B

Internal nodes of a decision tree correspond to :

Attributes

In a multiclass classification problem, Bayes classifier assigns an instance to the class corresponding to:

Highest aposteriori probability

Three identical bags contain blue and yellow balls. The first bag contains 3 blue and 2 yellow balls, the second bag has 4 blue and 5 yellow balls, and the third bag has 2 blue and 4 yellow balls. A bag is chosen randomly and a ball is chosen from it. If the ball that is drawn out is blue, what will be the probability that the second bag is chosen?

10/31

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