John Guo Cob 204 exam 3 (Chapters 2,3,10) with correct answers 100%

John Guo Cob 204 exam 3 (Chapters 2,3,10) with correct answers 100% ________ is a concept that computer systems will become sophisticated enough that they can adapt and create their own software and hence adapt their behavior without human assistance. - Correct Answer Artificial intelligence ________ is the extraction of knowledge from data based on algorithms created from training data. - Correct Answer Machine Learning How do machines learn? - Correct Answer through experience Machine learning is focused on predicting accurate outcomes based on ________ data. - Correct Answer previously known training A sales report that is current at the time the user accessed it on a Web server is an example of a(n) ________. - Correct Answer dynamic or exception report Differentiate between unsupervised and supervised data mining. - Correct Answer Data mining techniques fall into two broad categories: unsupervised and supervised. With unsupervised data mining, analysts do not create a model or hypothesis before running the analysis. Instead, they apply a data mining application to the data and observe the results. With this method, analysts create hypotheses after the analysis, in order to explain the patterns found. With supervised data mining, data miners develop a model prior to the analysis and apply statistical techniques to data to estimate parameters of the model. Which of the following is an example of a supervised data mining technique? - Correct Answer Regression Analysis Samuel, a researcher, deduces that single women between the ages of 25 and 30, who usually live in the suburbs and make thrifty purchases, prefer a particular brand of washing machines. In this case, Samuel uses ________ to understand customer behavior. - Correct Answer cluster analysis What is the difference between cluster analysis and classification? - Correct Answer · Cluster analysis groups data according to their similarities (that we don't know beforehand), and classification predicts output categories based given input data (we know the data is labeled). · Classification is supervised learning and cluster analysis is unsupervised learning. An OLAP report has measures and dimensions. Which of the following is an example of a dimension? - Correct Answer sales region Define descriptive analysis, predictive analysis, and prescriptive analysis. - Correct Answer Use my example of a medical doctor going through your annual physical. Doctor analyzes your current health conditions (descriptive), he tries to foresee what your health will be in the future (predictive), and give you recommendations/solutions (e.g., consume less sugar) as the outcome prescriptive analysis to improve your well-being. A ________ is a person or an organization that seeks to obtain or alter data or other IS assets illegally, without the owner's permission and often without the owner's knowledge. - Correct Answer Threat Which of the following is considered a threat caused by human error? - Correct Answer an employee inadvertently installing an old database on top of the current one Which of the following is considered a computer crime? - Correct Answer hacking of information systems A person claiming to be from central IT called Chris and asked him to participate in a password reset audit. The person had Chris change his password to the word "123456", and then again to a secret passphrase only Chris knew. Later that day Chris noticed odd system behavior, and then the system crashed. C