MASTERING D204: YOUR A+ ROADMAP
THROUGH THE DATA ANALYTICS
JOURNEY (2026–2027 EDITION)
These are the developers, and the system architects, the people
who focus on the hardware and the software that make data
science possible - THE CORRECT ANSWER-Data engineers
This is the phase of collecting data. - THE CORRECT ANSWER-Data
acquisition
Which phase? - Working with stakeholders to help them ask
better questions so that both they and you understand the
outcome. - THE CORRECT ANSWER-Discovery
What are the 4 parts of data analytics cycle? - THE CORRECT ANSWER-
Planning, Wrangling, Modeling and Applying
This phase is also known as the discovery phase. During this
phase, an analyst defines the major questions of interest that
need to be answered, understand the needs of the stakeholders,
and assess the resource constraints in the project. - THE CORRECT
ANSWER-Business understanding
____________________ is the person who champions the
vision of the project and has the authority to allocate resources.
- THE CORRECT ANSWER-The project sponsor
,__________________ is responsible for making sure things
get done on time and within budget and removes roadblocks. -
THE CORRECT ANSWER-Project manager
___________ is when new requirements are added to the
project that increases the time/resources needed to complete it.
- THE CORRECT ANSWER-Scope creep
What are the 3 types of analysis? - THE CORRECT ANSWER-
Descriptive, Predictive, Prescriptive
___________________________ describes the data that
is present. Mean, Median, Mode, counting things. How many of
each size and color of shirt were sold in the last month? Do we
sell more shirts in the summer vs winter? - THE CORRECT ANSWER-
Descriptive analysis
____________________ makes predictions about future
state of business. Forecasting volumes for example. Based on
last summer and winter, what will we sell next year? - THE
CORRECT ANSWER-Predictive analytics
_______________________ analysis with an end goal of
making a recommendation. What colors and sizes of shirts
should we sell to maximize profits? - THE CORRECT ANSWER-
Prescriptive analytics
______________________ is just looking at any variable
over time - THE CORRECT ANSWER-Time series analysis
,____________________ is a programing language that is
specific to statistics. It also has capabilities to visualize data. -
THE CORRECT ANSWER-R
_______________ is a multipurpose programing language
that has libraries that extend its capabilities to do statistical
analysis. - THE CORRECT ANSWER-Python
______________________ are platforms that specialize in
visualization. This is where you can make graphs and charts for
presentations and data storytelling to executive leaders. - THE
CORRECT ANSWER-Tableau and Power BI
_______________________ are instant messaging
platforms that facilitate in a faster, but less formal, way than
email. - THE CORRECT ANSWER-Teams, Slack
An European union law regulating their citizens must have
informed consent and ability to request or delete their own data
that you collect. - THE CORRECT ANSWER-GDPR
When the researching organization consciously ignores data
that calls their results into question or only presents one side of
the results that puts them in a positive light. - THE CORRECT
ANSWER-Conflict of interest
Sometimes data might not be available and the analyst will use
tools such as web scraping or surveys to acquire it during which
phase? - THE CORRECT ANSWER-Data aquisition
, The ____________ states that the sampling distribution of
the sample means approaches a normal distribution as the
sample size gets larger (if you were to take 50 people out of that
population and get the mean, then take another 50 random
people and get their mean age, and so forth, all of those means
would follow the normal distribution (bell curve)). - THE CORRECT
ANSWER-Central Limit Theorem
In this phase, the analyst begins to understand the basic nature
of data and the relationships within it. This phase often relies
on the use of data visualization tools and numerical summaries,
such as measures of central tendency and variability. - THE
CORRECT ANSWER-Data Exploration
__________________ enables an analyst to move beyond
describing the data to creating models that enable predicting
outcomes of interest. - THE CORRECT ANSWER-Predictive Modeling
Tools such as _______________ play an important role in
automating the training and using of models. - THE CORRECT
ANSWER-Python and R
In this phase, an analyst tells the story of the data and uses
graphs or interactive dashboards to inform others of the
findings from the analyses. - THE CORRECT ANSWER-Reporting and
Visualization
Even if you have a wide spread of a variable, let's say, age in a
population, and you take lots of sample groups, the mean age of
those sample groups would tend to have a normal distribution. -
THE CORRECT ANSWER-Central Limit theorem
THROUGH THE DATA ANALYTICS
JOURNEY (2026–2027 EDITION)
These are the developers, and the system architects, the people
who focus on the hardware and the software that make data
science possible - THE CORRECT ANSWER-Data engineers
This is the phase of collecting data. - THE CORRECT ANSWER-Data
acquisition
Which phase? - Working with stakeholders to help them ask
better questions so that both they and you understand the
outcome. - THE CORRECT ANSWER-Discovery
What are the 4 parts of data analytics cycle? - THE CORRECT ANSWER-
Planning, Wrangling, Modeling and Applying
This phase is also known as the discovery phase. During this
phase, an analyst defines the major questions of interest that
need to be answered, understand the needs of the stakeholders,
and assess the resource constraints in the project. - THE CORRECT
ANSWER-Business understanding
____________________ is the person who champions the
vision of the project and has the authority to allocate resources.
- THE CORRECT ANSWER-The project sponsor
,__________________ is responsible for making sure things
get done on time and within budget and removes roadblocks. -
THE CORRECT ANSWER-Project manager
___________ is when new requirements are added to the
project that increases the time/resources needed to complete it.
- THE CORRECT ANSWER-Scope creep
What are the 3 types of analysis? - THE CORRECT ANSWER-
Descriptive, Predictive, Prescriptive
___________________________ describes the data that
is present. Mean, Median, Mode, counting things. How many of
each size and color of shirt were sold in the last month? Do we
sell more shirts in the summer vs winter? - THE CORRECT ANSWER-
Descriptive analysis
____________________ makes predictions about future
state of business. Forecasting volumes for example. Based on
last summer and winter, what will we sell next year? - THE
CORRECT ANSWER-Predictive analytics
_______________________ analysis with an end goal of
making a recommendation. What colors and sizes of shirts
should we sell to maximize profits? - THE CORRECT ANSWER-
Prescriptive analytics
______________________ is just looking at any variable
over time - THE CORRECT ANSWER-Time series analysis
,____________________ is a programing language that is
specific to statistics. It also has capabilities to visualize data. -
THE CORRECT ANSWER-R
_______________ is a multipurpose programing language
that has libraries that extend its capabilities to do statistical
analysis. - THE CORRECT ANSWER-Python
______________________ are platforms that specialize in
visualization. This is where you can make graphs and charts for
presentations and data storytelling to executive leaders. - THE
CORRECT ANSWER-Tableau and Power BI
_______________________ are instant messaging
platforms that facilitate in a faster, but less formal, way than
email. - THE CORRECT ANSWER-Teams, Slack
An European union law regulating their citizens must have
informed consent and ability to request or delete their own data
that you collect. - THE CORRECT ANSWER-GDPR
When the researching organization consciously ignores data
that calls their results into question or only presents one side of
the results that puts them in a positive light. - THE CORRECT
ANSWER-Conflict of interest
Sometimes data might not be available and the analyst will use
tools such as web scraping or surveys to acquire it during which
phase? - THE CORRECT ANSWER-Data aquisition
, The ____________ states that the sampling distribution of
the sample means approaches a normal distribution as the
sample size gets larger (if you were to take 50 people out of that
population and get the mean, then take another 50 random
people and get their mean age, and so forth, all of those means
would follow the normal distribution (bell curve)). - THE CORRECT
ANSWER-Central Limit Theorem
In this phase, the analyst begins to understand the basic nature
of data and the relationships within it. This phase often relies
on the use of data visualization tools and numerical summaries,
such as measures of central tendency and variability. - THE
CORRECT ANSWER-Data Exploration
__________________ enables an analyst to move beyond
describing the data to creating models that enable predicting
outcomes of interest. - THE CORRECT ANSWER-Predictive Modeling
Tools such as _______________ play an important role in
automating the training and using of models. - THE CORRECT
ANSWER-Python and R
In this phase, an analyst tells the story of the data and uses
graphs or interactive dashboards to inform others of the
findings from the analyses. - THE CORRECT ANSWER-Reporting and
Visualization
Even if you have a wide spread of a variable, let's say, age in a
population, and you take lots of sample groups, the mean age of
those sample groups would tend to have a normal distribution. -
THE CORRECT ANSWER-Central Limit theorem
