MC	Which of the following measures cannot be used to make the splitting decision in a regression tree?	Entropy	correct	Mean Squared Error (MSE)	incorrect	ANOVA/F-test	incorrect	
MC	What is the correct ranking of the following analytics applications in terms of maturity?	HR Analytics (most mature), Marketing Analytics (medium mature), Risk Analytics (least mature).	incorrect	Marketing Analytics (most mature), Risk Analytics (medium mature), HR Analytics (least mature).	incorrect	Risk Analytics (most mature), HR Analytics (medium mature), Marketing Analytics (least mature).	incorrect	Risk Analytics (most mature), Marketing Analytics (medium mature), HR Analytics (least mature).	correct	
MC	Which of the following strategies can be used to deal with missing values?	Keep	incorrect	Delete	incorrect	Replace/impute	incorrect	All of these strategies can be applied	correct	
MC	The GIGO-principle mainly relates to which aspect of the analytics process?	Data selection	incorrect	Data transformation	incorrect	Data cleaning	incorrect	The GIGO-principle applies to all of these listed aspects	correct	
MC	Given the following decision tree:<br><br><img class="img-fluid" src="http://www.pdbmbook.com/static/quiz/fig20_6.png"><br><br>According to the decision tree, an applicant with Income > $50.000 and High Debt=Yes is classified as:	Good Risk	incorrect	Bad Risk	correct	
MC	Which statement is CORRECT?	Featurization in the context of neural networks refers to making features (=inputs) out of the network characteristics.	correct	The coefficient of determination R2 is often used to measure the performance of classification models.	incorrect	The adjacency matrix representing a social network is sparse since it contains a lot of non-zero elements.	incorrect	The big footprint access to data management and analytics capabilities is a serious drawback of cloud based solutions.	incorrect	
MC	Outlying observations which represent erroneous data are treated using...	missing value procedures.	correct	truncation or capping.	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	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	Which of the following is not an advantage of open source software for analytics?	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	It has been thoroughly engineered and extensively tested, validated and completely documented.	correct