WGU D204 Exam Questions and Answers 100% Pass

WGU D204 Exam Questions and Answers 100% Pass What are the 7 steps of the data analytics journey? - Answer- Business Understanding (Discovery Phase) Data Acquisition (Data Collecting) Data Cleaning Data Exploration Predictive Modelling Data Mining Reporting & Visualization Define: discovery phase - Answer- 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) - Answer- Frequently retrieved from a database What can an analyst do if data is not available? - Answer- use tools like web scraping or surveys to get it. What happens if the data cleaning step is ignored? - Answer- The results from the analysis become irrelevant What tools are used for data cleansing? - Answer- SQL, Python, R, Excel What is data quality measured in terms of? (2) - Answer- uniqueness, relevance Define: Data Exploration - Answer- The analyst begins to understand the basic nature of data and the relationships within it What does data exploration rely on? (2) - Answer- Use of data visualization tools and numerical summaries Define: Predictive Modeling - Answer- 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? - Answer- Python, R What tools became popular with the ability of computers to look for patterns in large amounts of data? - Answer- Data Mining Tools. Python, R What is the last step of the data analytics journey? - Answer- Reporting and Visualization What is the first step of the data analytics journey? - Answer- Discovery Phase / Business Understanding What is the second step of the data analytics journey? - Answer- Data Acquisition / Data Collecting What is the third step of the data analytics journey? - Answer- Data Cleaning / Data Wrangling / Feature Engineering / Data Munging What is the fourth step of the data analytics journey? - Answer- Data Exploration What is the fifth step of the data analytics journey? - Answer- Predictive Modeling What is the sixth step of the data analytics journey? - Answer- Data Mining What tools are used for reporting and visualization? - Answer- Tableau What are the goals of the reporting and visualization phase? - Answer- To provide actionable insights for various stakeholders Define: Reporting & Visualization - Answer- The analyst tells the story of the data and uses graphs or interactive dashboards to inform others of the findings from the analyses Data analysis is often seen as a combination of ______ and ______. - Answer- Value & Difficulty What are the four types of analytics? - Answer- Descriptive Diagnostic Predictive Prescriptive What is the main question that descriptive analytics aims to answer? - Answer- What happened? What is the main question that diagnostic analytics aims to answer? - Answer- Why did it happen? What is the main question that predictive analytics aims to answer? - Answer- What will happen in the future? What is the main question that prescriptive analytics aims to answer? - Answer- How can we make it happen? How can we change it? What action will achieve a particular outcome? T/F: Correlation does not imply Causation. - Answer- True T/F: In data analytics, it is harder to show correctional results. - Answer- False. It is easier to show correctional results. What does correlation imply? - Answer- That a relationship exists, but it stops short of proving causation. A conclusion based on ____ is a common mistake on both ______ & -____ models. - Answer- A conclusion based on correlation is a common mistake on both predictive and data mining models