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WGU D204 Study Questions and Answers 2023 (Verified Answers) 1.Which of these is NOT a topic of interest for Discovery/Planning/Business Understanding?A.Project Scope B.Identify stakeholders and research questions/KPIs C.Build a data pipeline (ETL)
D.Identify timeline, budget, and participants: C
2.What is a potential problem to consider in the planning phase?A.Lack of clear focus on stakeholders, timeline, limitations, and budget B.Quality and type of data may make access more difficult C.Some cleaning techniques could dramatically change data/outcomes D.Outliers not dealt with can cause problems with statistical models due
to excessive variability.: A
3.In what phase does the analyst identify the stake holders and research questions?: Business Understanding/Planning/Discovery 1 / 3
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4.In what phase does the analyst deal with the following:
Gather/collect data from a variety of sources Provide structure to data accessible via relational databases (SQL) Build data pipeline (ETL)
Use of API to download data from an external source: Data acquisition
5.In what phase does the analyst deal with the following:
Fixing improperly formatted values Dealing with duplicates, missing data, and outliers
Data reduction: Data cleaning/wrangling/scrubbing/munging
6.In what phase does the analyst deal with the following:
Central Tendency/ Measures of center (e.g., mean, median, mode), variabil- ity (e.g., standard deviations and quartiles) and distributions (e.g., normal, skewed, etc) Identify basic correlations between variables
Pattern discovery: Data exploration/Exploratory Data
Analysis(EDA)/Descriptive Statistics
7.In what phase does the analyst deal with the following:
Estimate/project future values or likelihood of an event. 2 / 3
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Extend correlations found in EDA to mathematical models
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