MC	Given the following five transactions:<br><br>T1 {K, A, D, B}<br>T2 {D, A, C, E, B}<br>T3 {C, A, B, D}<br>T4 {B, A, E}<br>T5 {B, E, D}<br><br>Consider the association rule R: A -> BD.<br><br>Which statement is correct?	The support of R is 60% and the confidence is 100%.	incorrect	The support of R is 60% and the confidence is 75%.	correct	The support of R is 100% and the confidence is 75%.	incorrect	The support of R is 75% and the confidence is 60%.	incorrect	
MC	Which statement is CORRECT?	The geodesic represents the longest path between two nodes.	incorrect	The betweenness counts the number of the times that a node or edge occurs in the geodesics of the network.	correct	The graph theoretic center is the node with the highest minimum distance to all other nodes.	incorrect	The closeness is always higher than the betweenness.	incorrect	
MC	Which statement is NOT CORRECT?	Although the benefit component is usually not that difficult to approximate, the costs are much harder to precisely quantify. 	correct	Negative ROI of analytics often boils down to the lack of good quality data, management support and a company-wide data driven decision culture 	incorrect	ROI analysis offers a common firm-wide language to compare multiple investment opportunities and decide which one(s) to go for.	incorrect	For companies like Facebook, Amazon, Netflix and Google a positive ROI is obvious since they essentially thrive on data and analytics. 	incorrect	
MC	Bootstrapping refers to:	Drawing samples with replacement.	correct	Drawing samples without replacement.	incorrect	
MC	Clustering, association rules and sequence rules are examples of:	Predictive analytics	incorrect	Descriptive analytics	correct	
MC	Consider a data set with a multiclass target variable as follows: 25% bad payers, 25% poor payers, 25% medium payers and 25% good payers. In this case, the entropy will be:	Minimal	incorrect	Maximal	correct	
MC	Which of the following costs should be included in a Total Cost of Ownership (TCO) analysis?	Acquisition costs	incorrect	Ownership and operation costs	incorrect	Post ownership costs	incorrect	All of these costs	correct	
MC	Decision trees can be used in the following applications:	Credit risk scoring, churn prediction, customer profile segmentation and market basket analysis.	incorrect	Credit risk scoring and churn prediction	correct	Credit risk scoring	incorrect	Credit risk scoring, churn prediction and customer profile segmentation	incorrect	
MC	Which statement is CORRECT?	The big footprint access to data management and analytics capabilities is a serious drawback of cloud based solutions.	incorrect	On premise solutions catalyze improved collaboration across business departments and geographical locations.	incorrect	An important advantage of cloud based solutions concerns the scalability and economies of scale offered. More capacity (e.g. servers) can be added on the fly whenever needed. 	correct	When using on premise solutions, maintenance or upgrade projects may even go by unnoticed.	incorrect	
MC	Which statement is NOT CORRECT?	The lift curve can be summarized by reporting top decile lift.	incorrect	There is a linear relation between AR and AUC: AR = 2 x AUC -1	incorrect	Data preprocessing activities such as handling missing values, duplicate data or outliers are preventive measures for dealing with data quality issues.	correct	Data stewards are the data quality experts who oversee assessing data quality by performing extensive and regular data quality checks.	incorrect