Ask Question, Ask an Expert


Ask DBMS Expert

Home >> DBMS

problem 1: Consider the following frequency counts of some item sets 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. (ex: 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 describe your answer.
problem 2: Your friend owns a computer store in Yuen Long, selling Desktop and Notebook PCs and other computer peripherals. Having been instead successful with his business there, he decided to venture to the infamous Mongkok Computer Center and has already been there for three months. As expected, compared to his Yuen Long store, his new store has been recording much larger revenue however when it comes to profit, he is not so sure. He requires to pay some times more in rent! In order to stimulate sales, your friend feels that he requires to understand his customers in Mongkok more. To help him do so, you have asked for a sample of the transactional data he collected and they are shown in table below.

1851_transaction data.jpg

a) Set the Minimum Support to 18% and Minimum Confidence to 80%, find all frequent  large  itemsets  (for product items)  and all interesting rules using the Apriori algorithm.

b) By setting the Lift Ratio to 2, which rules you discovered  in Part (a) are still interesting?

c) How many possible association rules (even though both the support and confidence are 0) would be generated from the following itemsets: {Case, Desktop, Maintenance,  Mouse, Speaker, Webcam} and {Computer, Printer, Peripherals, Notebook_PC}.  Compare the results, what you can conclude?
problem 3: You are working for the ABC Telecom and are given some customer records for data mining. You are asked to discover, from the data, patterns that characterize low-, medium- and high-usage customers. He would like to make sure that newly recruited salespersons be able to recommend the right service plans (500-free-mins (low-usage), 2500-free-mins  (medium-usage), and 5000-free-mins  (high-usage)) to the right customers. 
a) Show how you can make use of the ID3 algorithm to discover in a sample of customer records (shown in Table below) what best  plan to make to which kind of customers.

1837_training data set.jpg

b) You are given a testing data set (shown in Table above) as follows, how much should you trust the recommendations made according to the rules discovered by ID3 algorithm?
c) Use the Naïve Bayesian Approach to check the recommendations against the testing data set. How many recommendation(s) is/are trustful?
d) Given a choice between the  Naïve  Bayesian Approach  and the  ID3 algorithm for this task, which one would you choose? Why?

DBMS, Programming

  • Category:- DBMS
  • Reference No.:- M91845

Have any Question? 

Related Questions in DBMS

Assignmentyou are to design a program that will serve as a

Assignment You are to design a program that will serve as a database for keeping track of video games and various statistics for the games. This application will allow for the storing of the name of a video game, its gen ...

Ms access database assignment helpdo the easy way i really

MS ACCESS Database assignment help (DO THE EASY WAY I really just need this asap) (I have the database file ready to email to you. I dont think it let me upload the database file here.) Create a simple excel spreadsheet ...

Database designfrom textbook fundamentals of database

Database Design From Textbook: Fundamentals of Database Management Systems 2nd Edition. 1. Convert the Video Centers of Europe, Ltd., entity-relationship diagram in Exercise 2.2 into a well structured relational database ...

Lab 2 modifying a database design in visiothis assignment

Lab 2: Modifying a Database Design in Visio This assignment contains two Sections: Visio Diagram and Design Summary. You must submit both sections as separate files in order to complete this assignment. Use "Appendix A: ...

Learning outcomes1 manage user access and user profiles

Learning Outcomes 1. Manage user access and user profiles within a complex DBMS 2. Conduct database audits 3. Develop backup and recovery procedures Read the given scenario and perform all tasks. You have to answer all q ...

Mis 204 hands-on activityaccess - forms and

MIS 204 Hands-On Activity: Access - Forms and Reports Introduction In this assignment you will learn how to create forms and reports to access and analyze your data. Forms are useful for data entry and navigation. Report ...

Objective this is an individual assignment aimed to give

Objective: This is an individual assignment aimed to give the student exposure to the concepts relating to database systems and optimal strategies for efficient management of databases Learning Outcomes assessed: 1. Crea ...

Database design discusion 150 wordsnormalizationplease

Database Design Discusion (150 words) Normalization Please respond to BOTH of the following questions: Question A In your own words discuss the benefits of normalization. Question B Do you think we should normalize our d ...

Suppose that you are the database developer for a local

Suppose that you are the database developer for a local college. The Chief Information Officer (CIO) has asked you to provide a summary of normalizing database tables that the IT staff will use in the upcoming training s ...

Restaurants and fast-food chains rely heavily on business

Restaurants and fast-food chains rely heavily on business intelligence to make important decisions. Casinos do as well. Some of the leading restaurants, fast-food chains, and casinos using data warehouses include AFC Ent ...

  • 4,153,160 Questions Asked
  • 13,132 Experts
  • 2,558,936 Questions Answered

Ask Experts for help!!

Looking for Assignment Help?

Start excelling in your Courses, Get help with Assignment

Write us your full requirement for evaluation and you will receive response within 20 minutes turnaround time.

Ask Now Help with Problems, Get a Best Answer

WalMart Identification of theory and critical discussion

Drawing on the prescribed text and/or relevant academic literature, produce a paper which discusses the nature of group

Section onea in an atwood machine suppose two objects of

SECTION ONE (a) In an Atwood Machine, suppose two objects of unequal mass are hung vertically over a frictionless

Part 1you work in hr for a company that operates a factory

Part 1: You work in HR for a company that operates a factory manufacturing fiberglass. There are several hundred empl

Details on advanced accounting paperthis paper is intended

DETAILS ON ADVANCED ACCOUNTING PAPER This paper is intended for students to apply the theoretical knowledge around ac

Create a provider database and related reports and queries

Create a provider database and related reports and queries to capture contact information for potential PC component pro