MC	Bootstrapping refers to:	Drawing samples without replacement.	incorrect	Drawing samples with replacement.	correct	
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 75% and the confidence is 60%.	incorrect	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	
MC	Bootstrapping refers to:	Drawing samples with replacement.	correct	Drawing samples without replacement.	incorrect	
MC	Which of the following are interesting data sources to consider to boost the performance of analytical models?	Network data	incorrect	External data	incorrect	Unstructured data such as text data and multimedia data	incorrect	All of the above	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	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:	Maximal	correct	Minimal	incorrect	
MC	Which of the following is not an advantage of open source software for analytics?	It has been thoroughly engineered and extensively tested, validated and completely documented.	correct	It is available for free.	incorrect	It can be used in combination with commercial software. 	incorrect	A world-wide network of developers can work on it.	incorrect	
MC	To guarantee maximum independence and organizational impact of analytics, it is important that...	the Chief Data Officer (CDO) or Chief Analytics Officer (CAO) reports to the CIO or CFO.	incorrect	the CIO takes care of all analytical responsibilities.	incorrect	analytics is supervised only locally in the business units. 	incorrect	a Chief Data Officer or Chief Analytics officer is added to the executive committee who directly reports to the CEO.	correct	
MC	What statement about the adjacency matrix representing a social network is not true?	It has the same number of rows and columns. 	incorrect	It can include weights. 	incorrect	It is sparse since it contains a lot of non-zero elements.	correct	It is a symmetric matrix.	incorrect	
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 75%.	correct	The support of R is 100% and the confidence is 75%.	incorrect	The support of R is 60% and the confidence is 100%.	incorrect	The support of R is 75% and the confidence is 60%.	incorrect