Answer the following questions: a. Assuming the minimum support is 0.05, which itemsets are considered frequent b. What are the confidence values of {battery}→>{sunscreen} and {battery,sunscreen}>{sandals}? Which of the two rules is more interesting? c. Compute the lift and leverage for {battery,sandals} →{sunscreen}.

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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A local retailer has a database that stores 10,000 transactions of last summer. After
analyzing the data, a data science team has identified the following statistics:
{battery} appears in 6,000 transactions.
• {sunscreen} appears in 5,000 transactions.
{sandals} appears in 4,000 transactions.
• {bowls} appears in 2,000 transactions.
• {battery,sunscreen} appears in 1,500 transactions.
• {battery,sandals} appears in 1,000 transactions.
• {battery,bowls} appears in 250 transactions.
{battery,sunscreen, sandals} appears in 600 transactions.
Answer the following questions:
a. Assuming the minimum support is 0.05, which itemsets are considered frequent?
b. What are the confidence values of {battery}->{sunscreen} and
{battery,sunscreen}->{sandals}? Which of the two rules is more interesting?
c. Compute the lift and leverage for {battery,sandals} >{sunscreen}.
Transcribed Image Text:A local retailer has a database that stores 10,000 transactions of last summer. After analyzing the data, a data science team has identified the following statistics: {battery} appears in 6,000 transactions. • {sunscreen} appears in 5,000 transactions. {sandals} appears in 4,000 transactions. • {bowls} appears in 2,000 transactions. • {battery,sunscreen} appears in 1,500 transactions. • {battery,sandals} appears in 1,000 transactions. • {battery,bowls} appears in 250 transactions. {battery,sunscreen, sandals} appears in 600 transactions. Answer the following questions: a. Assuming the minimum support is 0.05, which itemsets are considered frequent? b. What are the confidence values of {battery}->{sunscreen} and {battery,sunscreen}->{sandals}? Which of the two rules is more interesting? c. Compute the lift and leverage for {battery,sandals} >{sunscreen}.
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