# Communication assignment

1. Consider the data set shown in Table 5.20 (439 page). (Chapter 5)

Don't use plagiarized sources. Get Your Custom Essay on
Communication assignment
Get a plagiarism free paper Just from \$13/Page

(a) Compute the support for itemsets {e}, {b, d}, and {b, d, e} by treating each transaction ID as a market basket.

(b) Use the results in part (a) to compute the confidence for the association rules {b, d} {e} and {e} {b, d}. Is confidence a symmetric measure?

(c) Use the results in part (c) to compute the confidence for the association rules {b, d} {e} and {e} {b, d}.

2. Consider the transactions shown in Table 6.15, with an item taxonomy given in Figure 6.15 (515 page). (Chapter 6)

(a) What are the main challenges of mining association rules with item taxonomy?

(b) Consider the approach where each transaction t is replaced by an extended transaction t_ that contains all the items in t as well as their respective ancestors. For example, the transaction t = { Chips, Cookies} will be replaced by t_ = {Chips, Cookies, Snack Food, Food}. Use this approach to derive all frequent itemsets (up to size 4) with support 70%.

(c) Consider an alternative approach where the frequent itemsets are generated one level at a time. Initially, all the frequent itemsets involving items at the highest level of the hierarchy are generated. Next, we use the frequent itemsets discovered at the higher level of the hierarchy to generate candidate itemsets involving items at the lower levels of the hierarchy. For example, we generate the candidate itemset {Chips, Diet Soda} only if {Snack Food, Soda} is frequent. Use this approach to derive all frequent itemsets (up to size 4) with support 70%.

3. Consider a data set consisting of 220 data vectors, where each vector has 32 components and each component is a 4-byte value. Suppose that vector quantization is used for compression and that 216 prototype vectors are used. How many bytes of storage does that data set take before and after compression and what is the compression ratio? (Chapter 7)

Order Now And Get A 20% Discount!
Pages (550 words)
Approximate price: -

Advantages of using our writing services

Custom Writing From Scratch

All our custom papers are written by qualified writers according to your instructions, thus evading any case of plagiarism. Our team consists of native writers from the USA, Canada, and the Uk, making it convenient for us to find the best to handle your order.

Unlimited Free Revisions

If you feel your paper didn't meet all your requirements, we won't stop till it's perfect. You're entitled to request a free revision within 7 days after we submit your paper.

Quality Writing In Any Format

If you have issues with citing sources and referencing, you need not worry. Our writers are highly knowledgeable in referencing, including APA/MLA/Havard/Chicago/Turabian and all other formatting styles.

All our custom papers are delivered on time, even the most urgent. If we need more time to perfect your paper, we may contact you via email or phone regarding the deadline extension.

Originality & Security

At Master Homework, your security and privacy is our greatest concern. For this reason, we never share your personal information with third parties. We use several writing tools to ensure your paper is original and free from plagiarism.

Our agents are online 24 hours a day, 7 days a week, and are always ready to serve you. Feel free to contact us through email or talk to our live agents whenever you need assistance with your order.

Try it now!

## Calculate the price of your order

We'll send you the first draft for approval by at
Total price:
\$0.00

How it works?

Fill in the order form and provide all details of your assignment.

Proceed with the payment

Choose the payment system that suits you most.

Our Services

We work nonstop to see the best client experience.

## Flexible Pricing

We offer pocket-friendly prices that coincide with the preferred client's deadline.

Our support team is always ready to ensure vital interaction between you and the writer whenever you need to elaborate on something.

Paper Submission

We deliver our papers early within the stipulated deadlines. We are glad to help you if there should be an occurrence of any alterations required.

Customer Feedback

Your review, positive or negative, is of great concern to us and we take it very seriously. We are, consequently adjusting our policies to ensure the best customer/writer experience.