D204 WGU Exam Questions and Answers (GRADED A+)
Business Understanding Phase - ANSWER-aka - planning, discovery Scope project Identify stakeholders and research questions/KPIs Identify timeline, budget, and participants Data Acquisition Phase - ANSWER-aka - Extraction, Data gathering, Data query, Data collection, ETL (extract, transform, load), Web scrapping Gather/collect data from a variety of sources Provide structure to data accessible via RDBMS (SQL) Build data pipeline use of API to DL data from external source Data Cleaning Phase - ANSWER-aka wrangling, scrubbing, munging fixing improperly formatted values dealing with duplicates, missing data, and outliers data reduction Data Exploration Phase - ANSWER-aka - EDA (exploratory data analysis), descriptive statistics Central Tendency/ Measures of center (e.g., mean, median, mode), variability (e.g., standard deviations and quartiles) and distributions (e.g., normal, skewed, etc) Identify basic correlations between variables Pattern discovery Predictive Modeling Phase - ANSWER-aka - data modeling, correlation based models, regress
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