Book - Chapter 5 Analytical Theory Association Rules Flashcards Preview

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Flashcards in Book - Chapter 5 Analytical Theory Association Rules Deck (13)
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1

What does association rules do

Goes through the items being purchased to see what items are frequently bought together and to discover a list of rules that describe the purchasing behaviour

2

If X is observed…

Y is also observed

3

What are association rules sometimes referred to as

Market basket analysis

4

What is the term item set

A collection of items or individual entities that contain some kind of relationship

5

What is the main algorithm for association rules

Apriori

6

What is support

Percentage of transactions that contain that item set

7

What does it mean when it says often enough

That is the minimum support

8

What is the minimum support set at

0.5

9

What is apriori property

If an item set is considered frequent, than any subset of the frequent items that must also be frequent

10

What is the first step of the apriori algorithm

Identify the frequent item set by starting with each item in the transaction as it meets the pre-defined minimum support threshold

11

What is confidence

The measure of certainty or trustworthiness associated with each discovered role

12

What is lift

How many times more often X and Y occur together than expected

13

What is leverage

The difference in the probability of X and Y appearing together in the dataset