Question

Classification and Reg Tress + Association Rules

Question 11

The number of association rules increases

Additively with number of items

Multiplicatively with number of items

Exponentially with number of items

Question 12

If there are k items, number of association rules formed is formulated as :

3^k - 2^(k-1)

3^k - 2^(k+1) + 1

3^k - 2^(k+1) - 1

3^k - 2^(k-1) + 1

Question 13

Consider the rules A -> B, B -> A, where A, B are two items. Lift for both the rules is same. :

True

False

Question 14

Association rule mining is an unsupervised form of learning

True

False

Question 15

Which of the following options is a supervised form of learning

Clustering

Association rule mining

Regression

None of the above

Answer 1

Answer 11.

The number of association rules increases exponentially with number of items.

As can be seen from the formula of number of association rules, it is clear that there is an exponential increase in the number of rules to the number of item sets.

Answer 12.

If there are k items, number of association rules formed is formulated as : 3^k - 2^(k+1) + 1

This is the standard formula to calculate the number of association rules formed.

Answer 13.

Consider the rules A -> B, B -> A, where A, B are two items. Lift for both the rules is same. : True

Since the support and confidence of both items will still be similar, the lift for both the rules will be the same.

Answer 14.

Association rule mining is an unsupervised form of learning: True

Since there is no target variable when using association, we can say that this is unsupervised.

Answer 15.

Which of the following options is a supervised form of learning: Regression

Regression is done on a target variable, thus it is a supervised form of learning.