WGU D204 EXAM
QUESTIONS & ANSWERS 100%
CORRECT (SCORED A+) What questions will data analytics consider improving 10% market share value to open
new store in a different location?
a. Get list of geographic areas
b. Reduce staff pay by 10%
c. Check compatible market value
d. None of the ab...
What questions will data analytics consider improving 10% market share value to open
new store in a different location?
a. Get list of geographic areas
b. Reduce staff pay by 10%
c. Check compatible market value
d. None of the above - ANSWER-C Check compatible market value
A data set has K variables, and the classifying method has the following steps:
compare levels on nearby data, assign a new case to a category of nearby beta, locate
the case in a k-dimensional space, in which order should the steps be applied
a. Assign compare locate
b. Compare assign locate
c. Locate compare assign
d. Locate assign compare - ANSWER-c. Locate compare assign
In which phase of the data analytics life cycle does an analyst build a graph?
a.Data exploration
b.Discovery
c.Predictive modeling
d.Data acquisition - ANSWER-a.Data exploration
An analyst applies a statistical formula to obtain the average temperature for a city over
the last 20 years. Which phase of the data analytics life cycle is represented by this
activity?
a.Discovery
b.Exploration
c.Modeling
d.Reporting - ANSWER-b.Exploration
An analyst has been asked to define variables in a dataset that may contain missing
values. Which activity of the analytics life cycle is represented?
a.Data collection
b.Data cleaning
c.Transforming improperly text
d.Disqualifying data sources - ANSWER-b.Data cleaning
,Which activity does an analyst perform in the discovery phase of the data analytics life
cycle?
a.Collecting data
b.Cleaning data
c.Identifying outliers
d.Defining business goals - ANSWER-d.Defining business goals
During which phase in the data analytics life cycle would a churn analysis be
performed?
a.Data cleaning churn
b.Data acquisition
c.Predictive analysis
d.Representation and reporting - ANSWER-c.Predictive analysis
What might be developed by data analysts when acquiring data from a data
warehouse?
a.The procedures for extracting files from the data warehouse
b.The procedures for updating tables in the data warehouse
c.Relational structures of tables
d.The SQL queries of data within the tables - ANSWER-d.The SQL queries of data
within the tables
Which aspect of data exploration occurs when an analyst writes code to compile a bar
graph of dog food sales per month?
a. Performance of a correlation analysis
b. Analysis of data anomalies
c. Verification through visualization
d. Determination of variabilities - ANSWER-c. Verification through visualization
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?
a. To minimize interruptions from maintenance shutdowns
b. To minimize the need for workforce safety training
c. To improve compliance with pipeline construction standards
d. To improve compliance with pipeline disposal standards - ANSWER-a. To minimize
interruptions from maintenance shutdowns
What is the necessary requirement when collecting data from different data sources
a.Data must be easy to understand
b.Data must have defined structure
c.Data must have great number of variable
d.Data must have features related to business goals - ANSWER-d.Data must have
features related to business goals
, Which mistake is commonly made during the predictive analytics phase?
a. The data are separated into different sets.
b. The variables are separated into response and independent variables.
c. The data are prepared before the model is developed.
d. The model is developed before the research question is known. - ANSWER-d. The
model is developed before the research question is known.
Why might a data analyst resample a data set with replacement data in a data mining
project?
a.Misidentification of causation
b.Wrong variables chosen for analyzation
c.Too little data for training and testing data sets
d.Skewed data resulting from outliers - ANSWER-c.Too little data for training and
testing data sets
Ex. The data team has processed the data and ... who will give the reports and
explanation to higher level?
a. Data Analyst
b. Data owner
c. Data researcher
d.None of the above - ANSWER-c. Data researcher
An analyst realizes that the data set has been reduced significantly, resulting in sample
sizes that are too small. In which phase of the data analytics life cycle did this likely
occur?
a. Data exploration
b. Data modeling
c. Data mining
d. Data discovery - ANSWER-c. Data mining
What strategy will contribute to effective data representation and reporting?
a.Creating a new training data set
b.Selecting data for a prediction model
c.Excluding unrelated data
d.Extracting data from source repositories - ANSWER-c.Excluding unrelated data
What are two purposes of the reporting phase of the data analytics life cycle? Select
two answers:
a.Provide the conclusions from the analysis in an engaging manner
b.Provide a tool for decision-makers to import and analyze more data
c.Provide actionable insights that can inform decision-making
d.Provide an automated way for decision-makers to test their own models - ANSWER-
a.Provide the conclusions from the analysis in an engaging manner
c.Provide actionable insights that can inform decision-making
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