My D204 WGU Study Set ACTUAL
UPDATED QUESTIONS AND CORRECT
ANSWERS
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 - CORRECT ANSWERS✅✅C
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. - CORRECT ANSWERS✅✅A
In what phase does the analyst identify the stake holders and research questions? -
CORRECT ANSWERS✅✅Business Understanding/Planning/Discovery
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 - CORRECT ANSWERS✅✅Data
acquisition
In what phase does the analyst deal with the following:
Fixing improperly formatted values
, Dealing with duplicates, missing data, and outliers
Data reduction - CORRECT ANSWERS✅✅Data cleaning/wrangling/scrubbing/munging
In what phase does the analyst deal with the following:
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 - CORRECT ANSWERS✅✅Data exploration/Exploratory Data
Analysis(EDA)/Descriptive Statistics
In what phase does the analyst deal with the following:
Estimate/project future values or likelihood of an event.
Extend correlations found in EDA to mathematical models
Predict/determine output values based on input values
Cross-validation of predictive models to ensure accuracy. - CORRECT
ANSWERS✅✅Predictive Modeling/Data Modeling/Correlation based models/Regression
models/Time Series
In what phase does the analyst deal with the following:
Creating training and testing datasets to build models from
Identify/detect patterns
Determine if groups (clusters) exist in data
Classify data into groups
Create models that "learn" and improve (e.g., machine/deep learning, AI, etc) - CORRECT
ANSWERS✅✅Data Mining/Machine Learning/AI/Supervised, Unsupervised Models
In what phase does the analyst deal with the following:
Tell a story with data
UPDATED QUESTIONS AND CORRECT
ANSWERS
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 - CORRECT ANSWERS✅✅C
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. - CORRECT ANSWERS✅✅A
In what phase does the analyst identify the stake holders and research questions? -
CORRECT ANSWERS✅✅Business Understanding/Planning/Discovery
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 - CORRECT ANSWERS✅✅Data
acquisition
In what phase does the analyst deal with the following:
Fixing improperly formatted values
, Dealing with duplicates, missing data, and outliers
Data reduction - CORRECT ANSWERS✅✅Data cleaning/wrangling/scrubbing/munging
In what phase does the analyst deal with the following:
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 - CORRECT ANSWERS✅✅Data exploration/Exploratory Data
Analysis(EDA)/Descriptive Statistics
In what phase does the analyst deal with the following:
Estimate/project future values or likelihood of an event.
Extend correlations found in EDA to mathematical models
Predict/determine output values based on input values
Cross-validation of predictive models to ensure accuracy. - CORRECT
ANSWERS✅✅Predictive Modeling/Data Modeling/Correlation based models/Regression
models/Time Series
In what phase does the analyst deal with the following:
Creating training and testing datasets to build models from
Identify/detect patterns
Determine if groups (clusters) exist in data
Classify data into groups
Create models that "learn" and improve (e.g., machine/deep learning, AI, etc) - CORRECT
ANSWERS✅✅Data Mining/Machine Learning/AI/Supervised, Unsupervised Models
In what phase does the analyst deal with the following:
Tell a story with data
