Data Science and Machine Learning exam questions and answers

Unstructured data any information that does not lend itself into any structured model often used in text analytics, data mining, or finding data patterns where none are readily apparent, also called "Big Data." Posts Texts Email Content Video Audio Unicorn or purple squirrel where computer science, math & statistics & subject matter expertise Brainpower Read More 0:00 / 0:00 Data Science Data Science combines computer science, statistics, and information science. Data Science combines computer science, statistics, and information science. Used for machine learning, AI, statistics, operations research, or IoT Semi structured data Product namesSKU's Titles, Street addressesEmail addresses Structured data Zip CodesClick-datatransactions Machine learning the ability of a computer to figure out the "correct" action without being explicitly programmed. Finding uncommon patterns Helpful with predictive analytics ie. cell phone ending contract Helpful with predictive analytics. Data mining data mining is your information that is being gone through similar to ML by discovering patterns given by a programmer (supervised learning) but also recognizes and simplifies patterns not given by the programmer adjusting the code accordingly (unsupervised learning). Supervised learning programming to do something- step by step directions ie. finding patterns given by the programmer think sorting recycling unsupervised learning explicitly programmed to find something or do something Data science examples Mobile Companies - predict when a customer will leave for another provider. They collect billing info, customer service interactions, and website visits to create a probability leave score. Then target offers and incentives for high risk scores. E-commerce - cross selling ads and products. "People who viewed X product also liked this" or recently visited sites products ads appearing on social media/news/banking sites.