Calculate the joint probability, Database Management System

Consider the following frequency counts of some itemsets in a transaction database r:

freq({A}, r) = 0.405

freq({B}, r) = 0.510

freq({C}, r) = 0.303

freq({A,B}, r) = 0.380

freq({A,C}, r) = 0.256

freq({B,C}, r) = 0.197

freq({A,B,C}, r) = 0.095

Based on this information, you can use them to compute the following probabilities. (e.g. P(X) = freq(X, r).)

a)  What is the joint probability P(A and B)? What is P(A) ? P(B)?

b) What are the confidence and lift ratio of the association rules generated from the following itemsets: {A, B, C} and { ¯A, B}?

c) Compare the results of a) and b) with the frequencies freq({A}, r) and freq({B}, r). What observations can you made about the relationship of A and B in terms of independence and possible causal relationship? Please explain your answer.

Posted Date: 4/5/2013 5:18:08 AM | Location : United States







Related Discussions:- Calculate the joint probability, Assignment Help, Ask Question on Calculate the joint probability, Get Answer, Expert's Help, Calculate the joint probability Discussions

Write discussion on Calculate the joint probability
Your posts are moderated
Related Questions
Describe Application programming interface? Application Programming Interface - Commercial SQL implementations take one of the two primary techniques for involving SQL in a p

Before we talk about the relational model in more detail, let us first define some very basic terms used in this model. Tuple Every row in a table shows a record and is cal

What is meant by computing the closure of a set of functional dependency? The closure of F denoted by F + is the set of functional dependencies logically implied by F.

Views A view is like a window by which data from tables can be changed or viewed. The table on which a view is based is known as Base table. The view is stored as a SELECT stat

What are the advantages of object oriented databases in comparison with others? Why it is still not widely used? Object oriented designs are coherent, efficient and less prone

What is an entity relationship model? The entity relationship model is a set of basic objects known as entities and relationship between those objects. An entity is a thing or


Server Control It is usual to control access to the data via the front end application, for example by displaying data as ‘read only'. This part of the assignment illustrates ho

The Enhanced Entity Relationship Diagram (ERD) produced with a drawing or case tool. Your EERD must use a ''standard'' notation style such as Crows Foot or Chen. Please note that t