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WGU D204 Exam Study Guide/ (Top 2024/2025 EXAM REVIEW PAPERS / GRADED A+/ 100% Accurate)

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WGU D204 Exam Study Guide What are the 7 steps of the data analytics journey? - Business Understanding (Discovery Phase) Data Acquisition (Data Collecting) Data Cleaning Data Exploration Predictive Modelling Data Mining Reporting & Visualization Define: discovery phase -Analyst defines the major questions of interest that need to be answered, needs of the stakeholders and assesses the resource constraints of the project Define: data acquisition (data collecting) -Frequently retrieved from a database What can an analyst do if data is not available? -use tools like web scraping or surveys to get it. What happens if the data cleaning step is ignored? -The results from the analysis become irrelevant What tools are used for data cleansing? -SQL, Python, R, Excel What is data quality measured in terms of? (2) -uniqueness, relevance Define: Data Exploration -The analyst begins to understand the basic nature of data and the relationships within it What does data exploration rely on? (2) -Use of data visualization tools and numerical summaries Define: Predictive Modeling -Allow the analyst to move beyond describing the data to creating models that enable predictions of outcomes of interest What tools are used for predictive modeling? -Python, R What tools became popular with the ability of computers to look for patterns in large amounts of data? - Data Mining Tools. Python, R What is the last step of the data analytics journey? -Reporting and Visualization What is the first step of the data analytics journey? -Discovery Phase / Business Understanding What is the second step of the data analytics journey? -Data Acquisition / Data Collecting What is the third step of the data analytics journey? -Data Cleaning / Data Wrangling / Feature Engineering / Data Munging What is the fourth step of the data analytics journey? -Data Exploration What is the fifth step of the data analytics journey? -Predictive Modeling What is the sixth step of the data analytics journey? -Data Mining What tools are used for reporting and visualization? -

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