Data Science and Big Data Analytics: E20-007

Consider a database with 4 transactions:

Transaction 1: {cheese, bread, milk}

Transaction 2: {soda, bread, milk}

Transaction 3: {cheese, bread}

Transaction 4: {cheese, soda, juice}

You decide to run the association rules algorithm where minimum support is 50%. Which rule has a

confidence at least 50%?

A. {cheese} => {bread}

B. {juice} => {cheese}

C. {milk} => {soda}

D. {soda} => {milk}

Trend, seasonal, and cyclical are components of a time series. What is another component?

A. Irregular

B. Linear

C. Quadratic

D. Exponential

You have used k-means clustering to classify behavior of 100, 000 customers for a retail store. You decide to use household income, age, gender and yearly purchase amount as measures. You have chosen to use 8 clusters and notice that 2 clusters only have 3 customers assigned. What should you do?

A. Decrease the number of clusters

B. Increase the number of clusters

C. Decrease the number of measures used

D. Identify additional measures to add to the analysis