Data preprocessing Study guides, Class notes & Summaries

What is PCA? (5 key points) Principal Component Analysis is a statistical technique used for dimensionality reduction, crucial when dealing with high-dimensional data in machine learning. It works by transforming original variables into new ones, called principal components, which are linear combinations of the original variables. Key Points: 1. Principal Components: Principal components are the directions in the data that maximize variance. The first principal component captures the most...

ISDS EXAM 4 QUESTIONS AND ANSWERS 100% CORRECT 2024 Data Mining A way to develop intelligence (i.e. actionable information or knowledge) from data that an organization collects, organizes, and stores. What recent factors have increased the popularity of data mining? General recognition of the untapped value hidden in large data sources. What four major types of patterns does data mining seek to identify? 1. Associations 2. Predictions 3. Clusters 4. Sequential Relationship...

Which of the following is least likely to be a good example of big data (Purchase behavior for 1000 users, Hundreds of gene sequences, Points on the trajectory of a falling object, A thousand YouTube videos) correct answers Points on the trajectory of a falling object Which of the following tasks is not part of preprocessing data? (Model and annotate data, Extract the key parts of the data, Run machine learning algorithms on the data, Clean the data) correct answers Run machine learning alg...

Big Data Exam 1 Questions With Verified Answers Big Data - answerlarge volumes of complex data that cannot be processed effectively using traditional methods/ applications 5 V's Model - answer1) Volume 2) Velocity 3) Variety 4) Veracity 5) Value Challenges of big data: - answer1) Storage 2) Transmission 3) Computation Data Science - answerThe scientific study of the creation, validation and transformation of data to create meaning Data Scientist - answerA professional who uses...

Hands-on Exercise Ex5-3: Detecting Fake News with Apache Spark and Spark NLP Assignment 1 – 4 (10pts each, 40pts in total) Do the exercises in Section 1.4 – 1.7 Assignment 5 (30pts) Rewrite the codes for detecting fake/real news in Trump and Biden tweet datasets. Note: Do not combine those datasets. • Read the article [21] • (10pts) Write the codes for downloading the two files: o Use the two links in the article o Use the links from the raw data by clicking the raw button on th...

WGU - Introduction to Analytics D491 Exam Questions With 100% Verified Answers What is data analytics? - The process of analyzing data to extract insights - The process of encrypting data to keep it secure - The process of storing data in a secure location for future use - The process of collecting data from various sources - answerThe process of analyzing data to extract insights What is data science? - The practice of using statistical methods to extract insights from data - A field ...

Big Data Exam 1 Questions With Verified Answers Big Data - answerlarge volumes of complex data that cannot be processed effectively using traditional methods/ applications 5 V's Model - answer1) Volume 2) Velocity 3) Variety 4) Veracity 5) Value Challenges of big data: - answer1) Storage 2) Transmission 3) Computation Data Science - answerThe scientific study of the creation, validation and transformation of data to create meaning Data Scientist - answerA professional who uses...

HIS implementation benefits to healthcare can improve cost control, increase the timeliness and accuracy of patient care and administration information, increase service capacity, reduce personnel costs and inventory levels, and improve the quality of patient care. Nurse informaticist role in health information system Looks for information, verifies ownership of information and connects other parties within the healthcare organization. Lewin's Change Model unfreezing, changing,...

Introduction to Analytics - D491 questions and answers latest top score. What is Data analytics? -The process of encrypting data to keep it secure -The process of storing data in a secure location for future use -The process of analyzing data to extract insights -The process of collecting data from various sources - correct answers.The process of analyzing data to extract insights. (Data analytics involves analyzing data to extract insights and inform decision-making. Th...

Intro to data analytics D491 questions and answers latest top score. Data Transformation - correct answers.Data mapping: converting data from one format to another. Data deduplication: eliminating repeated or redundant data. Derived variables: creating new variables from existing ones. Data sorting or ordering: arranging data in a specific sequence. Data Transformation occurs in the ______ _____________ phase, the role this applies to is the _____ A___ - correct an...