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

Your team is a consulting company that specializes in rapid

Your team is a consulting company that specializes in rapid application development. A client company wishes to improve their customer data and interactions records. You create a simple customer relationship system for t ...

Database management assignmentyou have been hired by

Database Management Assignment You have been hired by National Bank as their new database administrator. Your first task is to upgrade the bank's outdated computer system and implement a relational database management sy ...

Relational database systems comp 1005objective this is an

Relational Database Systems (COMP 1005) Objective: This is an individual assignment aimed to give the student exposure in understanding, designing, building and analyzing database systems for a given real-time based scen ...

Create a database to keep inventory of something you own

Create a database to keep inventory of something you own, such as books, CDs, movies, collectibles, etc. You can make these up if you want. (You could use this in real life to keep track of what other people have borrowe ...

Exercise 1 - html and Exercise 1 - HTML and XML ID Name Stars Facilities Address Distance

Exercise 1 - HTML and XML ID Name Stars Facilities Address Distance from center (KM) Available 1 Les Jardins du Marais 3 Internet 74 rue Amelot, Paris, 75011 2 True 2 Golden Tulip Little Palace 4 Internet Gym Parking Res ...

Frontlines united states of secrets all Frontline's United States of Secrets, all

Frontline's United States of Secrets, all episodes: (Links to an external site.) Nova's Genome specials ...

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 ...

At this point you decide to implement a hash structure for

At this point, you decide to implement a Hash structure for the contributor data to prepare for searches. You will read the contributor information from a file provided; it is a comma delimited (CSV) file. As each record ...

Data warehouses and data martswrite a one- to two-page

Data Warehouses and Data Marts Write a one- to two-page (250-500 word) paper that discusses the differences between data warehouses and data marts. Also, discuss how organizations can use data warehouses and data marts t ...

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 ...

  • 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

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

Describe what you learned about the impact of economic

Describe what you learned about the impact of economic, social, and demographic trends affecting the US labor environmen