WGU D204 STUDY SET PRACTICE ASSESSMENT 60
QUESTIONS WITH VERIFIED ANSWERS 2025/2026
Identifying business needs - CORRECT ANSWER Which activity does an analyst
perform in the discovery phase of the data analytics life cycle?
Data exploration - CORRECT ANSWER In which phase of the data analytics life
cycle does an analyst build a histogram?
Exploratory data analysis - CORRECT ANSWER An analyst applies a statistical
formula to obtain the average temperature for a city over the last 50 years. Which
phase of the data analytics life cycle is represented by this activity?
Detecting missing values - CORRECT ANSWER An analyst has been tasked with
defining data columns that could contain null values.
Which activity of the data acquisition phase is represented?
Cleaning data - CORRECT ANSWER Which activity in the data analytics life cycle
occurs during the data acquisition phase and requires the most time and effort
from the data analyst?
The SQL queries of data within the tables - CORRECT ANSWER What might be
developed by data analysts when acquiring data from a data warehouse?
, Interquartile range - CORRECT ANSWER What can be identified using a box plot?
The analyst will lack insight into the structure of the data set. - CORRECT ANSWER
What will be a consequence of poor attention to detail during the data exploration
phase?
Verification through visualization - CORRECT ANSWER Which aspect of data
exploration occurs when an analyst writes code to compile a bar graph of dog
food sales per month?
To minimize interruptions from maintenance shutdowns - CORRECT ANSWER An
oil company uses robots and sensors to detect how pipeline corrosion changes
over time. The collected data is then used in a predictive model that estimates
when a pipe should be replaced.
How does the predictive model serve this oil company?
Predictive analysis - CORRECT ANSWER During which phase in the data analytics
life cycle would a churn analysis be performed?
The model is developed before the research question is known. - CORRECT
ANSWER Which mistake is commonly made during the predictive analytics phase?
Too little data for training and testing data sets - CORRECT ANSWER Why might a
data analyst resample a data set with replacement data in a data mining project?
QUESTIONS WITH VERIFIED ANSWERS 2025/2026
Identifying business needs - CORRECT ANSWER Which activity does an analyst
perform in the discovery phase of the data analytics life cycle?
Data exploration - CORRECT ANSWER In which phase of the data analytics life
cycle does an analyst build a histogram?
Exploratory data analysis - CORRECT ANSWER An analyst applies a statistical
formula to obtain the average temperature for a city over the last 50 years. Which
phase of the data analytics life cycle is represented by this activity?
Detecting missing values - CORRECT ANSWER An analyst has been tasked with
defining data columns that could contain null values.
Which activity of the data acquisition phase is represented?
Cleaning data - CORRECT ANSWER Which activity in the data analytics life cycle
occurs during the data acquisition phase and requires the most time and effort
from the data analyst?
The SQL queries of data within the tables - CORRECT ANSWER What might be
developed by data analysts when acquiring data from a data warehouse?
, Interquartile range - CORRECT ANSWER What can be identified using a box plot?
The analyst will lack insight into the structure of the data set. - CORRECT ANSWER
What will be a consequence of poor attention to detail during the data exploration
phase?
Verification through visualization - CORRECT ANSWER Which aspect of data
exploration occurs when an analyst writes code to compile a bar graph of dog
food sales per month?
To minimize interruptions from maintenance shutdowns - CORRECT ANSWER An
oil company uses robots and sensors to detect how pipeline corrosion changes
over time. The collected data is then used in a predictive model that estimates
when a pipe should be replaced.
How does the predictive model serve this oil company?
Predictive analysis - CORRECT ANSWER During which phase in the data analytics
life cycle would a churn analysis be performed?
The model is developed before the research question is known. - CORRECT
ANSWER Which mistake is commonly made during the predictive analytics phase?
Too little data for training and testing data sets - CORRECT ANSWER Why might a
data analyst resample a data set with replacement data in a data mining project?
